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Compilation  ©  2007  LexisNexis  Academic  &  Library  Solutions, 
a  division  of  Reed  Elsevier  Inc.  All  rights  reserved. 

oCX  £dli 



Thomas  E.  Jeffrey 
Senior  Editor 

Brian  C.  Shipley 
Theresa  M.  Collins 
Linda  E.  Endersby 

David  A.  Ranzan 
Indexing  Editor 

Janette  Pardo 
Richard  Mizclle 
Peter  Mikulas 

Paul  B.  Israel 

Director  and  General  Editor 


Rutgers,  The  State  University  of  New  Jersey 
National  Park  Service,  Edison  National  Historic  Site 
New  Jersey  Historical  Commission 
Smithsonian  Institution 

A  UPA  Collection  from 

Ijjji  LexisNexis* 

7500  Old  Georgetown  Road  •  Bctlicsda,  MD  20814-0126 

Thomas  A.  Edison  Papers 

Rutgers,  The  State  University  of  New  Jersey 
endorsed  by 

National  Historical  Publications  and  Records  Commission 
18  June  1981 

Copyright  ©  2007  by  Rutgers,  The  State  University 

All  rights  reserved.  No  part  of  this  publication  including  any  portion  of  the  guide  and 
index  or  of  the  microfilm  may  be  reproduced,  stored  in  a  retrieval  system,  or  transmitted  in  any 
form  by  any  means— graphic,  electronic,  mechanical,  or  chemical,  including  photocopying, 
recording  or  taping,  or  information  storage  and  retrieval  systems— without  written  permission  o 
Rutgers,  The  State  University  of  New  Jersey,  New  Brunswick,  New  Jersey. 

The  original  documents  in  this  edition  arc  from  the  archives  at  the  Edison  National 
Historic  Site  at  West  Orange,  New  Jersey. 

ISBN  978-0-88692-887-2 


Director  and  General  Editor 
Paul  Israel 

Senior  Editor 
Thomas  Jeffrey 

Associate  Editors 
Louis  Carlat 
Theresa  Collins 

Assistant  Editor 
David  Hochfelder 

Indexing  Editor 
David  Ranzan 

Consulting  Editor 
Linda  Endcrsby 

Visiting  Editor 
Amy  Flanders 

Editorial  Assistants 
Alexandra  Rimer 
Kelly  Enright 
Eric  Barry 

Outreach  and  Development 
(Edison  Across  the  Curriculum) 

Theresa  Collins 

Business  Manager 
Rachel  Wcisscnburgcr 


Rutgers,  The  State  University  of  New  Jersey  National  Park  Service 

Richard  L.  McCormick  Maryanne  Gerbauckas 

Ziva  Galili  Michelle  Ortwcin 

Ann  Fabian 

Paul  Clemens  Smithsonian  Institution 

Harold  Wallace 

New  Jersey  Historical  Commission 
Marc  Mappen 


Robert  Friedel,  University  of  Maryland 
Louis  Galambos,  Johns  Hopkins  University 
Susan  Hockey,  Oxford  University 
Thomas  P.  Hughes,  University  of  Pennsylvania 
Ronald  Kline,  Cornell  University 
Robert  Rosenberg,  John  Wiley  &  Sons 
Marc  Rothenberg,  Joseph  Henry  Papers,  Smithsonian  Institution 
Philip  Scranton,  Rutgers  University/Hagley  Museum 
Merritt  Roe  Smith,  Massachusetts  Institute  of  Technology 


We  thankfully  acknowledge  the  vision  and  support  of  Rutgers  University  and  the 
Thomas  A.  Edison  Papers  Board  of  Sponsors. 

This  edition  was  made  possible  by  grant  funds  provided  from  the  New  Jersey  Historical 
Commission,  National  Historical  Publications  and  Records  Commission,  and  The  National 
Endowment  for  the  Humanities.  Major  underwriting  has  been  provided  by  the  Barkley  Fund, 
through  the  National  Trust  for  the  Humanities,  and  by  The  Charles  Edison  Foundation. 

We  are  grateful  for  the  generous  support  of  the  IEEE  Foundation,  the  Hyde  &  Watson 
Foundation,  the  Martinson  Family  Foundation,  and  the  GE  Foundation.  We  acknowledge  gifts 
from  many  other  individuals,  as  well  as  an  anonymous  donor;  the  Association  of  Edison 
Illuminating  Companies;  and  the  Edison  Electric  Institute.  For  the  assistance  of  all  these 
organizations  and  individuals,  as  well  as  for  the  indispensable  aid  of  archivists,  librarians, 
scholars,  and  collectors,  the  editors  arc  most  grateful. 

A  Note  on  the  Sources 
The  pages  which  have  been 
filmed  are  the  best  copies 
available.  Every  technical 
effort  possible  has  been 
made  to  ensure  legibility. 


Reel  duplication  of  the  whole  or  of 
any  part  of  this  film  is  prohibited. 
In  lieu  of  transcripts,  however, 
enlarged  photocopies  of  selected 
items  contained  on  these  reels 
may  be  made  in  order  to  facilitate 


Naval  Consulting  Board  and  Related  Wartime  Research  Papers 
Correspondence  (1917) 

These  folders  contain  correspondence  and  other  documents  relating  to 
Edison's  role  as  Chairman  (later  President)  of  the  Naval  Consulting  Board 
(NCB),  as  well  as  to  his  personal  naval  research,  which  began  in  1 91 7  shortly 
before  the  United  States  entered  the  war.  The  major  problem  that  occupied 
Edison  and  other  inventors  was  the  preservation  of  merchant  shipping 
capacity  in  the  face  of  Germany’s  unrestricted  submarine  warfare.  U-boats 
were  sinking  cargo  tonnage  faster  than  it  could  be  replaced,  jeopardizing  the 
Allied  ability  to  continue  the  war.  Research  projects  undertaken  by  Edison  and 
his  staff  focused  on  enabling  ships  to  detect  and  evade  torpedoes  and  to 
avoid  being  detected  by  the  enemy. 

Among  the  correspondents  are  Miller  Reese  Hutchison,  Edison's  chief 
engineer  and  personal  representative  who  served  with  him  on  the  NCB,  and 
other  Board  members,  including  secretary  Thomas  Robins,  Lawrence 
Addicks,  Leo  H.  Baekeland,  Howard  E.  Coffin,  Hudson  Maxim,  William  L. 
Saunders,  and  Frank  J.  Sprague.  Other  correspondents  include  U.S.  Navy 
officers  George  E.  Burd,  Edward  W.  Eberle,  Miles  A.  Libbey,  and  Clyde  S. 
McDowell,  as  well  as  the  Secretary  of  the  Navy  Josephus  Daniels,  to  whom 
Edison  reported  his  research  results.  Among  the  Edison  experimenters 
represented  in  the  documents  are  Jerry  T.  Chesler,  E.  Rowland  Dawson, 
William  Deans,  Theodore  M.  Edison,  Absalom  M.  Kennedy,  William  H. 
Knierim,  Samuel  C.  Shaffner,  Bruce  R.  Silver,  Selden  G.  Warner,  and  Henry 
G.  Wolfe.  Other  scientists  and  engineers  who  appear  as  correspondents 
include  Karl  T.  Compton,  Charles  Fabry,  Reginald  A.  Fessenden,  Frank  B. 
Jewett,  John  W.  Lieb,  Ralph  D.  Mershon,  Ernest  Rutherford,  and  Mina  M. 
Edison's  brother-in-law,  Halbert  K.  Hitchcock.  There  is  also  correspondence 
with  officials  of  the  Cunard  Steamship  Co.,  including  attorney  Lucius  H.  Beers 
and  U.S.  director  T.  Ashley  Sparks,  and  with  suppliers  of  equipment  and 
materials  such  as  John  A.  Brashear,  Ellwood  Ivins,  and  the  Julius  King 
Optical  Co.  Some  of  the  documents  are  records  of  telephone  conversations 
conducted  on  Edison’s  behalf  by  his  personal  assistant  William  H. 
Meadowcroft  or  by  office  assistant  Henry  A.  Altengarten. 

Subjects  relating  to  the  NCB  include  the  organization  of  antisubmarine 
warfare  efforts,  visits  by  distinguished  foreign  scientists,  and  attempts  to 
resolve  the  dispute  over  the  location  of  the  Naval  Research  Laboratory. 

Subjects  relating  to  Edison’s  personal  research  include  his  summer  use  of  the 
USS  Sachem  at  Sag  Harbor  on  Long  Island  for  underwater  sound  detection 
expertments”  his  work  in  Washington,  D.C.,  beginning  in  October,  and  the 
development  of  various  devices  by  his  e^P®rimenters,  including^lphurK;  acid 
cmnkp^ereen  shells  aural  direction  finders,  hydrogen  detectors,  and  a 
remotely  detonated  battlefield  explosive  devised  ^  T^^^latoffor 
documents  concern  the  use  of  Fessenden  s  audion-based  os^^tor  f°r 
submarine  detection,  requisitions  of  equipment  and  supplies  from  the  U.  . 
military  and  private  companies,  ship  defense  and  suhrnanneevasion  tachcs. 
A  small  number  of  unsolicited  inquiries  or  suggestions  to  which  Edison 
prepared  a  draft  reply  have  also  been  selected. 

Approximately  20  percent  of  the  documents  have  been  selected.  The 
unselected  material  consists  primarily  of  unsolicited  offers  or  requests,  most 
of  which  received  a  brief  form  reply.  Other  unselected  documents  include 
letters  of  transmittal  and  acknowledgment, 

eauioment  and  supplies,  multiple  copies  of  outgoing  letters  sent  to  many 
similar  recipients,  discussions  of  staff  arrangements  (including  passes  for 
access  to  military  sites),  copies  of  technical  and  strategic  reports  forwarded 
to  Edison  by  other  NCB  members,  routine  telegrams  exchanged  between 
Edfson ? employees,  correspondence  on  expense  claims,  blueprints,  and 
oversized  maps  and  charts. 

Naval  Consulting  Board 
and  Related  Wartime  Research  Papers 
July  1917 

Henry  1.  Dohorty,  EBq., 

Sixty  V/al  1  Street, 

How  York,  12  .Y. 

Priond  Dohorty:  ' 

Yours  of  the  27th  ultimo  at  hand. 

At  2000  pound a  pressure  in  the  projectile, 
duo  to  electrolytic  gaB,  the  available  onorg.y  is 
10,300  as  against  100,000  for  pure  nitroglycerine. 

The  proscure  in  the  projectile  would  have  to  bo 
incroasod  to  at  loaat  18,000  pounds  tor  equaro  infch 
for  the  electrolytic  gases  to  oqual  the  same  filled 
uitli  T.  II.  T.  at  no  proeaurc.  It  would  bo  a  pretty 
hard  technical  nut  to  cruel:  to  mako  it  practical. 

T.  H.  T.  gooa  wholly  into  fixed  gas  on 
explosion  and  alEO  gives  the  heat.  On  explosion  of 
electrolytic  gas  it  goot?  to  a  liquid ,  and  only  gives 
the  hout  of  combination.  Two  opposite  effects,  giving 
low  enorgy  output 

Yours  sincerely. 


,  'S'  A  J*~ 

\  Uoau^X  AJ  <2?^* 

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Jt  M-c"®-  ^ - 

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jy-C  <Q-^v»-cx>te  OC*-<£-C>«  / 



LlCi '-S-^f'^'-t 


"ho  Chief  of  Ordnanoo, 

United  Ctatoc  arny, 
iVeehinnton,.  a.  C. 


12.-.  Edt'in.  Unit!'.,  Jr.,  ban  been  in  ny  Chonical 
laboratory  for  the  pact  nine  nontbe.  I  conclfior  him 
a  rood  Cfconict. 

I  and orotund  that  ho  is  nahlap  application  to 
-on  for  oocnisoion  in  tho  Ordnance  officoro  Eonorvo 
Coi-ps.  while  1  an  uorry  to  loose  hit)  corvicoo  hor< 
I  third:  in  vie.-,  of  his  proviouo  in  the. 
hsrploalvo  Industry,  that  ho  trill  bo  ablo  to  rondor 
noro  vuluable  oorrico  to  oar  Country  so  on  officer 
of  tho  orchtenoo  off  leer’ a  hasorvo  Corps  than  hero. 

I  ttiho  ploaouro  in  roO-rriona  Inc  hin  to  f°u* 

'  yours  very  truly,  . 

July  3,  191-7 

Ur.  A.  u.  Kcnnociy, 
c/o  C.  P.  Ircia, 

Union  Utroot, 

P.ocV  Bank,  _ 

Hoar  Ur .  Uennody : 

,  I  hnvo  telephoned  you  tho 

followinr  aossaeo  at  -Ur.  Edison's  request.  Ur. 
Irvrin  too;:  it  down  and  said  he  vrould  pivo  it 
Jo  you  and  I  am  no~  confirming  it.  Yhehnossapc 
is  as  follows: 


Djn’t  unload  yoHr  and  ion. 
I  v:ill  cono  to  Uinpor  Docl:  and 
arrunye  tainpe.  Wo  xant  your 
eudion  in  addition  to  ouy  set. 

Yours  very  truly. 

to  Ur.  Edison. 




fCrvu  — _ ^ 

db ly  /dr't-AA-^/^r  ...  Q-<y-o(k  S- 

— W- 

\a/^  tfocT^l  c(  iO"»\  to 

^3oc^-  <yC  y  &-tAj 
<P  CA-f .  GLC^f", 


July  3,  1917 

lion.  Josephus  Daniels, 

"ho  Secretary  of  the  Ilavy, 
Washington,  2).  C. 

liy  dour 

.  Daniels: 

,  .  ...  I  am  enclosing  herewith  Kr. 

Ldison  s  bill  covering  cash  disbur Dements  from 

?  JUn°  32Jh»1917»  for  laboratory  ilxneri- 
mental  worh,  amounting  to  £lG, 093.50. 

„  .  ,  ,  1  trouble  you  to  tho  oxtont  of  ashing 

you  to  hindlyr  acknowledge  rocoipt,  as  I  son!  to 
““v,!:1??  25th”  for  vlD.  394.60  and  do  not 

hnov  vrhethor  or  not  it  over  reached  you. 

-  ^r*'  icon  is  working  incessaritlv  day' 

and  night  on  tho  groat  nroblon,  and  scorns  to  be 
quito  sanguine. 

Yours  sincoroly. 

Assistant  to  Hr.  Edison. 

Enclosure . 


July  3, 

1917  . 

My  dear  Mr.  Edison: 

I  am  in  receipt  of  Hr.  Meadowcrof t ' s  letter^ of 
x  don't  think  that  tho  searchlight  shutter 

the  power,  if  P0^“X^ae'Lno  testi  yet  to  determine  xts 
working  distance  during  daytime .  Inspect,  wlthul  a 

few  days,  to  get  some  thing  out  of  uiis. 

I  will  forward  a  copy  of  his  letter  to  the  H®ry 

v/ork  as  we  have  done  on  this  subject. 

Shanking  you  for  your  kindness  in  calling  my 
attention  to  this,  I  am 

Mr.  Shomas  A.  Edison, 
Orange,  Ilew  Jersey. 


Hatoa.  €<o^tsijxxing  Board 


July  5th,  1917. 

Mr.  Thomas  A.  Edison, 

President  Naval  Consulting  Board, 

Menlo  Park,  N.  J. 

My  dear  Mr.  Edison: 

As  I  kpow  you  have  made  a  very  extensive  study 
of  Batteries  of  all  kinds  I  am  appealimg  to  you  for  some  in¬ 
formation  on  the  subject  which  will  assist  me  in  the  work  I 
am  carrying  on  for  the  Naval  Consulting  Board.  In  some  of 
the  work  it  is  desirable  to  have  a  battery,  either  primary  or 
secondary,  which  will  as  nearly  as  possible  fulfill  the  fol¬ 
lowing  conditions: 

(1) .  The  maximum  possible  output  in  KWH  per 
unit  of  volume  and  unit  of  weight. 

(2) .  The  capability  of  remaining  on  open  circuit 
for  indefinite  periods  -  say  as  long  as  a  year  -  without 
serious  deterioration,  so  that  when  suddenly  called  upon  at 
any  time  it  will  supply  power  at  somewhere  near  its  normal 
rating  for  at  least  36  hours  continuously. 

(3) .  Its  construction  should  be  such  that  it 
can  be  turned  into  any  position  without  detriment  and  can 
operate  in  that  position. 

I  remember  that  years  ago  you  improved  the 
Lalande  cell,  and  that  the  Edi son-LaLande  cell  was  sold 
quite  extensively  for  a  long  while.  I  have  not  heard  much 

Mr .Edison  #2  7-5-17 

of  it  lately.  I  forget  now  whit  its  characteristics  were,  al¬ 
though  I  was  fairly  conversant  with  them  at  one  time.  Pos¬ 
sibly  this  form  of  cell  would  fulfill  my  requirements.  Per¬ 
haps,  however,  some  form  of  storage  cell  would  be  better,  either 
your  cell  or  a  lead  cell.  The  life  of  the  battery  need  not  be 
a  long  one,  except  as  regards  the  open  circuit  life  mentioned 
above.  That  is  to  say,  if  at  the  end  of  the  36  hours(mentioned 
above)  it  went  out  of  business  entirely  this  fact  would  not 
be  objectionable  provided  it  could  be  depended  upon  adsolutely 
for  the  36  hours  of  service  whenever  demanded  of  it. 

If  you  can  give  me  the  information  above  ashed 
for  I  shall  greatly  appreciate  it.  Or,  if  you  are  not  in  a 
position  to  do  so,  and  can  refer  me  to  someone  wno  could  supply 
it,  I  shall  greatly  appreciate  that  also. 

80  Maiden  Lane, 

Hew  York  City. 



in  Park  Row,  New  York 
July  5,  1917. 

To  the  Members  of  the  Naval  Consulting  Board, 
Dear  Sirs: 

Please  be  advised  that  the  next  meeting  of  the  Board 
will  be  on  July  7,  1917,  at  10  A.M.  in  the  Library  of  the 
Carnegie  Institution,  Washington,  D.  C. 

Very  truly  yours, 





' ,  July  6,  1917 , 

War  Department , 

Office-  of  the  Chief  of  Ordnance, 
7th  and  E  Stroote  liV/,  • 
ViUDhington,  D.  0.  * 

P.  3U  Lillee,  Jr., 

1st  Lt.  C.  A.  0.,  U.  S.  A., 
Incpr  Powder  Explosivos .  • 

Dear  3ir 

Our  .Hr,  CheBlor  received  your  favor  of 
the  Ed  instant.  lie  io  so  exceedingly  busy  day  ' 
and  night  with  Lir.  Edison  that  ho  cannot  find  time 
to  write  in  person,  and  has  asked  no  to  write  to 
you.  • 

He  sayB  that  he  is  qui to  willing  to  give 
you  such  information  ao  ho  can  on  tho  subject  diB- 
cusBed  In  your  letter.  Ho  "thinks  that  tho  points 
■will  be  ratteh  bet  er  brought  out  in  a  personal  inter¬ 
view,  tip  there  is ’a  groat  deal  to  bo  said  on  tho 
subject.  It  will  be  impossible  for  bln  to  go  aov.n 
to  baching  ton,  as  he  is  ‘exceedingly  busy  working 
constantly  with  hr.  Edition  on  experiments  for  tho 

Ur.  Choolor  ougi  octs  that  you  make  a. trip 
to  Orange  and  soo  him.  .  Possibly  it  may  bo  a  .little.. 
difficult,  to.  make  art  appointment,  us  -Mr.  Edison's 
experiments  will  take  him  ..away  from  tho  Laboratory 
for  a  fow  days  in  the  very  -near  future,  and  hr. Cho ti¬ 
ler  will  undoubtedly  accompany  him. /  However,  if 
you  will  tvrito  to  rno  and  name  eovoral  days  next  v/ook 
on  any  of  which  you  could  come  horo,  1  will  write 
or  telegraph  you  as  soon  aCiI  .am  able  to  mako  a  def¬ 
inite  appointment  with  Ur.  Chotilcr  to  bo  horo. 

Your e  very  truly; 

Asois.tant  to  Kr.  Edison. 


Speoial  Vacuum 

;  i 

Tubes  M-36607 

Western  Electric  Company, 



483  WEST  STREET  July  6,  19 17  • 



lakeside  Avenue, 

West  Orange,  H.J. 

Dear  Mr.  Edison :- 

Mr.  Shreeve  tells  me  that  he  reoently  called  Mr. 
Meadowcroft  on  the  telephone  and  informed  him  that  w  e  had  at  last 
succeeded  in  producing  some  of  the  special  vacuum  tubes  which  you 
requested.  These  tubes  have  additional  supports  for  the  plates, 
grids  and  filaments.  The  purpose  of  the  extra  supports  being 
to  prevent  as  far  as  possible  meohanioal  vibrations  which  might 
appear  in  the  amplified  current  as  disturbing  noises. 

In  regard  to  the  tubes  which  we  have  already  supplied 
you  with,  I  wish  to  make  it  entirely  clear  that  these  tubes  were 
designed  for  commercial  forms  of  repeater  apparatus  and  were  in¬ 
tended  to  be  used  under  conditions  which  are  not  in  any  way  so 
exacting  as  those  which  the  production  of  a  four  or  five  stage  am¬ 
plifier  imposes.  Also,  while  we  have  done  everything  in  our  power 
to  meet  your  requirements  in  the  matter  of  producing  special  tubes 
we  are  not  convinced  in  our  own  minds  that  the  results  will  be  satis¬ 
factory.  In  doing  this  special  work  we  have  spared  neither  pains  nor 
expense  and  if  the  results  are  not  what  you  expect,  it  is  apparent  to 
us  that  the  solution  can  only  be  obtained  by  making  a  more  profound 

IhiB  Btudy  would, 

study  of  the  fundamental  faotB  in  the  caBe. 
of  course,  involve  a  considerable  amount  of  time  and  expense,  which 
outlay,  particularly  in  the  matter  of  time,  I  presume  the  exigencies 
of  the  case  will  not  permit. 

As  explained  to  Mr.  Meadoworoft  we  are  holding  the 
special  tubes  subject  to  your  instructions. 

T.f .  Ifn-fmpilv  _ 

c/o  llewark  Bay  Yacht  Club, 

^/_ Street , _ 

Bayonne,  II.  J. 



VR-WSS-2G 840 




jjy  dear  Lieadowcrof  t : 

X  herewith  acknowledge  your  letter  of 
July  3rd,  forwarding  duplicate  hills  of  work 
done  hy  Ur.  Edison.  The  hill  for  :„19 , 894.o0 
was  I  am  sure,  covered  hy  public  hill  ana 
amount  sent.  Public  hill  will  he  trade  out 
for  the  sum  of  $16,093.50  and  forwarded  im¬ 

l,ir.  '7m.  E.  ileadowcrof t , 
Edison  laboratory. 
Orange,  II.  J. 

July  11,1917. 

Capt.  W.  Strothers  I-raith,  U.  S.  1!., 

II  a  t  y  Department, 

Washington,  I).  C . 

I.iy  Soar  Captain  Smith-.  .  VR-'.ysS-£0a40 : 

I  an  in  roccipt  of  your 

favor  of  the  loth  instant  in  regard  to  I'.r .  Edison's 
bills  for  his  cafch  disbursements  on  the  Government 
work.  X  note  that  public  bill  will  bo  made  out 
for  the  sum  of  $16,095.50  and  'forward cc!  immediately, 
and  beg  to  thank  you  for  your  prompt  attention. 

X  am  afraid  you  ere  undor  an  erroneoue 
impression  that  .the  previous  bill  for  $19, 094. GO 
has  been  paid.  Up  to  this  timo  the  amount  lias 

not  been  roceivod,  and  as  Mr.  Edison’s  letter  enclos¬ 
ing  ,  the  bill  had  novor  been  acknowlodred ,  I  was 
afraid  it  might  have  miscarried. 

Yours  sincerely,  , 

Assistant  to  Mr.  Edison. 


'Speoial  Amplifier  Bulbs  M-37607 

Western  E/ectric  Company, 



July  11,  1917. 


o/o  Thomas  A.  EdiBon,  Ino., 
lakeside  Avenue, 

Orange,  M.J. 

Dear  Mr.  Meadoworof t : - 

In  order  to  keep  our  records  straight  this  letter 
is  to  notify  you  that  on  July  9th  we  sent  by  speoial  messenger 
addressed  to  you  at  Lakeside  Avenue  - 

3  speoial  type  7  vacuum  tubes 
3  standard  "  V  "  "  specially  seleoted 

The  speoial  tubes  had  the  additional  supports  for 
filaments,  plates  and  grids  as  requested  by  Mr.  Edison. 

The  reoeipt  of  the  tube3was  acknowledged  by  Mr. 

T.  Winkler. 

Yours  truly,  xi 


Chief  Engineer. 

July  12,1917 

Major  lialph  D.  Hershon, 

00  Malfl on  lane, 

I!ow  York,  ii.Y. 

Dear  iir.  Morshon: 

•Your  favor  of  the  5  th  instant 
has  boon  brought  to  ray  attention.  The  Edison-Lolando 
coll  in  now  used  by  over y  Bailroad  in  tho  U.  a. 
for  signalling  purposes,  having  replaced  all  others. 
This  coll  can  remain  on  ooen  circuit  for  an  indef¬ 
inite  tirao  and  will  then  give  its  full  rating. 

Thb  alkaline  storage  battery  does  not  hold 
its  full  chargo  for  any  great  length  of  time.  The 
lead  battery  is  soraov.hat  hotter  in  this  rcspoct. 

I  will  liavo.  raailod'  to  yon  tho  various 
catalogues  of  the  Edison  lolando  and  Storage  batteries. 
If  you  could  indicate  tho  connection  in  which  the 
battery  is  to  bo  usod  and  what  is  required  wo  might 
havo  eoraothing  special  made  for  you. 

Yours  vory-  truly. 



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Subject:  Request  far  results  of  teBts  on  fire-resisting 


(The  Bureau  has  been  informed  that  a  fire- 
resisting  paint  made  by  the  Patton  Paint  Company, 
Hewark,  Hew  Jersey,  was  used  on  the  interior  wood¬ 
work  of  all  buildings  recently  constructed  by  you. 
The  Bureau  has  the  use  of  paints  of  this  character 
under  investigation,  and  would  be  pleased  to  re¬ 
ceive  results  of  tests  of  the  various  fire-resisting 
paints  which  you  have  investigated. 


Assistant  to  Bureau. 

Mr.  Thomas  A.  Edison, 

Orange,  Hew  Jersey. 

Orange ,  H .  J . 

Dear  Mr.  Meadowcroft 

Complying  with  your  request,  I  am 
sending  you  a  short  description  of  the  gentlemen  who 
y/ill  visit  the  laboratory  of  Mr.  Edison.  I  have  given 
them  exact  instructions  as  to  how  to  take  the  train  and 
told  them  that  somebody  from  your  laboratory  would  be  at 
the  station  (Orange)  to  guide  them  on  their  arrival  with 
the  10:13  train. 

Very  truly  yours, 



Commandant  Fabry  ib  a  well  known  Professor  of  Physics 
at  the  University  of  Lyons  and  ia  the  head  of  tho  Commiooion. 

Ho  io  particularly  intoreoted  in  electrical  matters  and  wireless 

telegraphy.  He 

ru'  u5' 


Vfi<  fii>  i*  *  •• 

ft,,;,  . 


"auU  a,  t 

Profaoeor  Abraham,  of  the  Sorbonne  in  Pario,  in  a  very 
i  woll  known  authority  on  viireloon  telegraphy.  He  ie  now  a  Captain 
5  or  a  Colonel,  I  do  not  know  which.  He  is  said  to  be  one  of  the 
1  greateot  author  it  iee  on  the  propulaion  of  eleotrio  waves  and  waa 
S  sent  hero  on  a  special  mioeion  from  the  Franoh  Government  ocvoral 
years  ago  to  synchronize  the  time  between  the  Greenwich  Oboorvatojy 
and  Washington  by  means  of  the  propulaion  of  the  electric  wave. 

Captain  Capart  you  can  eaoily  diutinguioh  because  lie  is 
the  tallest  and  thinnost  of  the  lot  and  hio  cheat  io  covered  with 
mcdala  of  every  kind.  He  has  been  through  more  trouble  and  mir- 
t  uculoua  escapes  than  one  could  imagino.  He  is  a  Belgian  by  birth 
r  and  was  an  oldctrioal  engineer  in  Switzerland.  ?;hon  the  war  broke 
out,  he  engaged  in  the  Belgian  army  as  a  private  soldier.  His  dis¬ 
tinguished  himself  in  such  a  way  that  ha  soon  was  promoted  several 
times  in  succession.  Finally  a  French  General,  after  seeing  him 
-5  at  work,  made  him  hia  special  aide  and  promoted  him  to  the  rank 
*5  of  Captain  in  tho  French  army,  although  ha  still  wears  a  Belgian 
uniform.  Ha  i3  an  interesting  chap,  full  of  life  and  good  humor. 

Captain  Bupouey  is  a  regular  captain  in  the  army.  He 
,  has  seen  quite  some  trenoh  service.  Full  of  French  wit  and  o.nthu- 
■  aiasm.  He  is  not  a  scientist  but  is  an  authority  on  Roman  lan¬ 
guages  and  at  one  time  was  exchange  professor  at  tho  Univorsity 
t,  of  Harvard  and  the  Univeroity  of  California.  He  io  tho  Secre¬ 
tary  of  the  Commission  and  assists  the  members  whenever  they  get 
some  hesitation  about  their  English. 

Captain  do  Guiohoe  (the  Duke  do  Grammont  do  Gulches), 
an  oxpoxt  aviator  and  ongineer,  who  is  here  mostly  in  relation 
to  uviation.  JfU  face  Ann^t,, it  fMno  U'A,r  /o/A/J  «-•?*  J/uttevC. 

All  tho  above  mentioned  gentlemen  epcak  and  understand 


Professor  Grignurd  got  the  Hobel  Prize  for  ohemiutry  a 
few  years  ago.  He  is  specially  known  in  organic  chemistry.  Ho 
teaches  at  the  Univeroity  of  Raney.  Ho  only  speaks  French. 

To  asaist  him  ie  £r>  Engel,  who  is  an  industrial  chemiot 
and  metallurgist.  He  is  very  well  informed  and  has  the  rank  of 
Llettenant  or  Captain,  I  do  not  know  which.  He  io  easily  recog¬ 
nisable  because  he  wears  a  long  jot-blaok  beard.  He  has  been  in 
this  country  before  and  until  1914  was  engineer  at  the  Anaconda 
tyorks.  Hio  wife  is  a  Canadian. 



•Lieutenant  Boutillon,  a  specialist  in  wireless  telegraphy 
Abetti  is  an  Italian  officer  (wireless?) 

&r*  SS“L 

tei  CffiNsvmiis  Baarv 

,  Thomas  A. Edison, 

President,  Naval  Consulting  Board, 
Orange,  B.J. 

July  13,  1937 
cS-ci<|  t&zd  c<* 

J&jLc CU>  d" 

Dear  Mr .Edison: 

I  have  your  letter  of  the  12th,  in  replyjjfcj 
mine  of  the  5th,  in  regard  to  Batteries 

a  number  of  catalogues  from  you  but  they _ r  __  _ 

Edison  Storage  Battery.  There  is  none  apparently  referringfJo^£t>>iVjr 
the  (Edison-lelande  BatteryV^n  which  I  shotod^ver^  Jmtb£  ^ike^Jp-  --*■ 

•saa*.  * 

y  all  refer  to  the  ) 

.  c-u.  C,U  <~rj 

-fie.  n.C£CJ.v~cSl  c*a  'loti&y  „  /llCa-^toc 

have  information. 

The  immediate  use  which  I  have  in  mind  for  such 
a  battery  as  that  covered  in  my  letter  of  inquiry  is  in  con¬ 
nection  with  a  magnet  bomb  or  mine,  which  would  adhere  to  the 
hull  of  a  submarine  to  be  carried  along  with  it.  The  idea  is 
that  ordinarily  the  electro  magnet  would  be  unexcited, but  that 
the  exciting  current  would  be  switched  on  as  soon  as  the  subma¬ 
rine  came  in  contact  with  the  bomb.  One  of  the  ideas  in  con¬ 
nection  with  such  a  bomb  is  that  it  would  explode  only  if  the 
submarine  dived,  so  that  it  would  be  harmless  for  surface  ves¬ 

Some  preliminary  experiments  were  carried  out 
recently  on  this  device  and  gave  very  promising  results.  If  we 
can  get  a  battery  which  will  fulfill  the  conditions  outlined 
in  my  letter  of  the  5th,  I  think  it  is  very  likely  that  a  de¬ 
vice  could  be  designed  along  the  lines  indicated  which  would 

July  14,1917. 

Havy  Dopartment, 

Bureau  of  Yardc  and  Docks, 
Yiashlngton,  D.  C. 

SUBJECT:-  P.oquoet  for  results  of  tests 

on  firc-ronisting  paints. 

Gontlemon :  . 

Eeplying  to  your  favor  of  the  l£th 
instant, (filo  856-3),  1  have  U30d  a  paint  con¬ 
sisting  of  silieato  of  soda  with  a  sine  oxide 
fillor.  All  tho  woodwork  of  oovoral  corrugated 
iron  buildings  were  givon  dne  coat,  put  on  vory 

In  two  firoe  this  paint  made  tho  burn¬ 
ing  of  tho  wood  so  slow  that  it  delayed  tho  spread 
of  tho  firo.long  enough  for  tho  Fire  Department 
to  got  woll  prepared ,  and  in  both  cases  tho  dam¬ 
age  wuo  slight. 

Aa  tho  Patton  r.ooplo  offered  to  make 
tho  mixture  for  mo  cheaper  that  I  could  myeolf / 
make  it,  I  had  then. do  it,  they  being  manufact¬ 
urers  of  tho  same  kind.  If  you  want  to  know  tho 
price  I  paid,  I  will  look  it  up  and  inform  you. 

I  made  a  largo  numbor  of  tests  with 
difforont  paints  on  laths,  aha  the  silicate  paint 
mao  tho  boot  for  dolaying  combustion  and  by  far 
tho  cheapest. 

Yours  vory  truly. 


Leuft.  Uoe^  (icn^o  uSttwcf  <f>P di'f^cexte  <2^ 

/dcrdto.  L0-tZ&  oJ^ywc  £>gide  J-t-CMriX  ^'*e- 
U ^kof  X*  t3T-r^c|cu(ec(.  iKA'W  (yu^lcA.^Y* 
(jrtMe  eft  ^*0  p-cCT  i^t-v  0  Ef- y  LC\^*~ad\ . 

<€  ■  d  (  * 

/ttO-tt  Jo-<£6  *f^i43>  ftA-C.  ^-«J-c^UA.O< 

L<?<S-*rc)  -<}<S  Q-(ctuJ  1$5lX~  tyt  ck&bu^cL  /'^p 

•sft!|?  t&c  L/ot,e  -LtriAc/  ^4-*'  Z^-6— 

ij!«:  cfuJLt  to  %et  j(2>cfi-p<ai1<c>;  T~  ^ 

D^ot-a^jo  }r>C.  olct-^ 

^  0  \ 

^Mril  ~tfvc  ^cCttdvy  jae,^ js£a. 

I  'Tw-wjfe.e.  )■$£  -j-enr  v*^-<,  <£^cA<xjfctAV 

,  l^,CUVk  ^  (Ldrt^Sc*  <k«-pU£^  Vn-*-<,(tU,  *-^A> 

iu,  «±^k^frrr  pfjw 

$cl*a \e-  j  K.^*-^  txHcLua.  <s>v~©  ary 

Cfeuou  Xsy  <ij' 


’¥  L*>+JLQs  jL&-~Cr-4i  tjt  c 

9 —  U^fre)-#^ 

Western  Electric  Company , 



UR.  THOUAS  A.  SDI80H ,  £)aiu&'Jc  V HA»**IaW**  w  curv*'**** 

w,  w  ui.  3  r*  "K  **  r~TJ’  • 

”  „*  a  -**«=&  U  ^Y^'r 

My  dear  Mr.  Edison;  /  ,  M  AL*^<6tis 

x  „»*„  „  »  rO 

on  February  14th  last  I  wltun«iert^^pre8Bion  that  you  would 
need  hia  aervioea  tor  hut  £fe wT££J  Slnoe  that  ttae~woy*  for 
the  Government  haa  piled  in  on  ua  at  ja  enormoua^atrW  we 
have  had  a  oonaiderahle  depletion  of  our  foroea  though  men 
enlisting  and  being  called  into  aervioe  and  through /other a 
entering  the  technical  departmenta  of  the  Army  and  ^avy  until 
now  we  are  actually  being  hard  preaaed  for  men  of  Mr.  Gargan'a 
abilities .  If,  therefore,  it  would  be  poaaible  for  you  to  re¬ 
linquish  hia  services  at  an  early  date  without  serious  detriment 
to  me  work  you  are  doing  it  would  be  of  great  service  to  us. 

With  kindest  personal  regards,  I  am, 

Yours  very  truly, 


Chief  Engineer. 

Hatol  CWSUUINti  Bcmw> 



in  Italic  Row,  New  York 
July  14,  1917. 

To  the  Members  of  the  ITaval  Consulting  Board, 


Please  be  advised  that  the  next  meeting  of  the  Board 
will  be  held  on  July  31,  1?17,  at  10  A.  11.  in  the  Carnegie 
Institution,  Washington,  D.  C. 

Very  truly  yours. 



July  17,191V 

Dr.  F.  B.  Jewett, 

Chief  Enginoor, 

Western  Electric  Company, 

463  West  Strcot, 

How  York,  II  .Y. 

15y  doar'Dr.  Jowott:. 

,  Your  favor  of  the  14th  instant 

has  boon  reooived  this  morning.  I  am  glad  to-  say 
that  hr.  Gargon  has  boon-  of  very  considerable  asEist- 
anco  to  mo  in  my  work  for  the  Government,  but  I  can 
got  along  for  the  procont  with  a  substitute  from  the 
lion  York  Edison  Company,  who  has  turnod  out  to  be 
very  satisfactory. 

I  am  very  much  obliged  to  you  for  allow-  • 
ing  mo  to  retain  Hr.  Gurgen  so  long,  and  I  will 
arrange  to  lot  him  go  at  the  end  of  this  wook. 

With  kind  regards,  I-romain, 

Yours  very  truly, 


General  Electric  Co., 

Edition  lamps  Works,  '  ■ 

Harriaon,  If.  J. 

My.  d oar  Hr.  Ropers:  Attention  Hr.  H.  B.  Horrors: 

Hr.  Edison  would  like  you  to  .  - 

rush  half- do  a  on  lamps  through  for  him.  Thoy  aro 
to  be  used  in  his  oxporiment6  for  the  Govornmont. 

I  am  tending  you  a  sample  as  to  siso  and  base.  The 
lamps  are  to  be  tipless;  sarao  os  sample. 

lie  wishos  to  use  the  lamps  on  6  volts, 
and  the  . f  ilamont  to  be  as  ebneontrated^pot 

of  light  as  can  bo,  and  as  nearly  as  posciblo  in  tho 
form  of  a  watch  spring  spiral.  Tho  light  will  be 
used  from  tho  ond  of  the  lamp,  and  not  the  side. 

Can  you  put  oi;t.  lamps.  right  through  for 
Hr.  Edison?  ’ 

Yours  vory  truly. 

Assistant  to  Mr.  Edison. 



Subject:  Bests  of  fire-resisting  paints. 


The  Bureau  acknowledges  with  thanks  receipt 
of  your  letter  of  July  fourteenth  which  contains -very 
helpful  information  regarding  fire-resisting  paint 
used  on  certain  of  your  structures. 


Assistant  to  Bureau. 

Mr.  Thomas  A.  Edison, 

Orange,  How  Jersey, 

July  10,1017. 

Mr.  Lucius  Hart  Boors, 

49  Wall  Street,  , 

Hew 'York,  H.Y. 

Door  tor.  Boors: 

Ur.  -idioori  wishos  no  to  write  and 
ask  you  to,  obtain  for  him  a  littlo  information.  Ho 
wishes  to  know  tho  numb or  of  the  avorago  revolutions 
made  by  the  propollor  on  tho  avorago  froight  stoamor. 

Awaiting  'tho  favor  of  your  roply,  I  remain. 
Yours  very  truly. 

Assistant  to  Ur.  Kaioon. 



Lt/ric  t  L- 

JERRY  CHESTER  •  ■  . 



A  l-.i  KENNEDY 

a./iv  K*— u.-  ^  •^*^■7]  ,  rj/ 



July  19,  1917. 

Thomas  A.  Edison,  Esq., 

Orange,  Hew  Jersey. 

Dear  Sir: 

Yesterday, when  you  were  good  enough  to  devote  so 
much  time  to  helping  us  in  anti  submarine  efforts,  you  asked 
me  to  get  information  for  you  in  answer  to  several  questions 
relating  to  merohant  vessels,  and  you  also  aBked  to  have 
sent  out  to  you  an  experienced  sea  oaptain  with  whom  you  oould 

Today  I  have  been  over  the  matter  with  Ur.  T. Ashley 
Sparks,  who  is  the  agent  in  the  United  States  of  my  clientB, 
the  Ounard  Company,  and  is  also  one  of  the  directors  of  the 
Company.  He  is  having  definite  information  obtained  as  to  sev¬ 
eral  of  the  questions  you  asked  and  will  arrange  at  any  time 
convenient  to  you  to  have  an  experienced  sea  captain  oome  out 
to  your  laboratory.  He  has  in  mind  two  captainB  who  will  be 
available  early  next  week  but  are  not  available  thiB  week. 

I  expect  to  see  Dr.  HutohiBon  in  Washington  tonight  and  per¬ 
haps  oan  arrange  with  him  for  some  appointment  when  it  will  be 
convenient  for  you  to  have  one  or  more  of  these  captains  oall 
on  you. 


Ab  regards  the  Plimsoll  m^rk-  Mr.  SparkB  tells 
me  that  earlier  in  the  war  Lloyds  re-inspected  most  British 
vessels  and  wherever  possible  changed  the  Plimsoll  mark,  thus 
adding  to  the  draft  and  diminishing  the  freeboard,  and  that 
this  raising  of  the  mark  was  as  much  as  two  feet  in  some 
cases.  Mr.  Sparks  doubts  whether  there  oan  be  any  further 
raising.  In  seme  cases  a  change  has  been  made  in  the  deoks 
or  upper  structure  so  as  to  bring  this  change  of  draft  within 
the  Lloyds  rules. 

I  hope  to  have  the  answers  ready  for  you  on  the 
other  questions  shortly,  and  if,  in  connection  with  these 
matters,  there  are  questions  relating  to  ships  and  shipping 
on  vfaioh  we  can  furnish  any  information  whioh  would  be  useful 
to  you,  I  hope  you  will  call  upon  ub  for  anything  that  we  can 
do . 

Faithfully  yourn, 


Singer  Ufg.  Company, 

Slisabethport,  ii.J. 


Please  Golfer  to  boarcr  tho  mtorial 
loft  at  Ginger  Company 'n  dock  by  Mr.  Kennedy  from 
tho  yacht  Iitnpant,  for  return  to  Mr.  Baison't- 

Youro  vory  truly. 

Assistant  to  Mr.  Sdison. 

Tlvv.  - 

jujjuJL  L>-~sl. 

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July  20,  1917. 

Bear  Mr.  Beers 

In  reply  to  your  three  questions  I  give 
you  the  following  answers 

1  (Q)  What  is  average  height  load  line  to  top 

of  staok? 

(A)  Porty-sir  feet. 

2  fQ )  What  is  average  height  from  upper  works 

to  top  of  stack? 

(A)  Thirty  feet. 

Z  (Q)  What  is  the  average  free  hoard  of  steamers? 

(A)  "Is*  feet. 

You  will  realize  that  it  is  pretty  difficult  seeing 
that  all  steamers  are  different  to  give  an  average  that 
will  fit  many  oases,  hut  I  have  discussed  the  matter 
with  our  Superintendent  Engineer  and  thiB  is  the  nearest 
we  can  get  to  it. 

Sinoerely  yours, 

luolus  H.  BeerB,  Esq., 

Of  Messrs.  lord,  Bay  &  Lord, 

49  Wall  Street, 


July  £1,1917 . 

Hr-.  Ashloy  Sparta, 

Cunnrd  Steamship  Lino, 

24  Stato  Street, 
lion  York,  li.Y. 

Dear  l!r.  Sparta:  ' 

Iho  L'ow  York  Kdison  Company  ISnginoors 
Just  report  that. about  200  tons  of  Anthracite  Coal,  not 
a mailer  than  poa,  will  carry  tho  "Ivonia"  and .ships  of 
that  ciso,  through  the  bad  zone,  going,  and  coming  .without 
smoko  or  any  change  in  operation. 

;  By  2uosday  next,  I  hope  to  have  a  modol  of 
tho  "Ivonia"  showing  tho  application  of  low  visibility 
and  will  bring  it  over. 

.  Yours  vory  truly,  ■  ’ 


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1/1/ OJv^aam/-  • 





Mr.  Thomas  A.  Edison, 
West  Orange,  H.  J. 

Dear  Mr.  Edison: 

Our  Mr.  Henry  Gave  has  reported  on  his  visit 
to  vou  Saturday,  and  we  wish  to  say  to  you  that  any 
assistance  which  we  can  render  you  in  accomplishing 
the  object  which  you  have  in  mind,  will  he  most  cheer¬ 
fully  given. 

Thanking  you  for  the  opportunity  offered,  we 



|  (S%(p 





\jL^~  » -  *•* 


LOct-vv.'f  Lk^’K 

— — - — — — - :  :  Mr.  JSdlBon  received  your 

kind  letter  and  has  something,  of  Interest  to  . show  you.  •> 
If  you  got  to  Dow  TCork,  coma  ovor.  '  M 

W.  H.  Uoadovfbroft. 

July  24,1017. 

Captain  Palfrey, 

Cumrd  Stoaraship  Cq  . , 

Pior  53  north  Kivor, 

Hew  York,  II. Y. 

Ily  dour  Captain: 

Will  you  ploaoo  alio::  Ur.  Bonjamin 
Lioborcitz,  ono  of  rny  assistants,  to  soo  tho  wiralees 
sot  on  a  freighter  and  also  to  talk  to  tho  v.iroloes 

Yours  very  truly. 


Le  Il'Cv'  al\eJrtA>  cf? 

'V-W  ~tz  <2-c.<_  f(Lc  ^ 

'=+-  otj2-tU3  "&  ~t~ct£j(  IlS& 


rvU.  <_o 


Navai.  C©Msmi,iN<s  Board 

My  dear  Mr.  Edison: 

Referring  to  my  letter  of  the  5th  to  you  rela¬ 

tive  to  batteries.  In  that  letter  I  asked  three  questions. 

Two  of  them  have,  I  believe,  been  answered  from  your  laboratory, 
but  the  first  one,  viz:  the  best  battery  to  fulfil  the  condition 
of  "the  maximum  possible  output  in  KWH  per  unit  of  volume  and 
unit  of  weight"  was  not  answered.  I  got  the  impressibn,  how¬ 
ever,  that  the  Edison  Primary  Battery  fulfils  this  condition. 

Is  this  correct? 

I  note  your  offer  to  make  up  something  special 
for  us,  if  such  seems  desirable.  With  this  possibility  in 
view  I  am  going  to  put  up  to  you  our  immediate  requirements, 
which, since  I  last  v/rote  you, have  been  more  definitely  ascer¬ 

V/e  are  at  the  present  time  using  a  magnet 
which  consumes  11  watts  using  2/3  ampere  at  16.8  volts.  We 
would  like  to  have  a  cell,  or  a  combination  of  cells,  which 
would  excite  this  coil  for  36  hours  continuously.  If  the 
Edison  Primary  Cell  were  made  use  of  I  presume  that  the  best 
showing  in  regard  to  weight  weald  and  volume  would  be  that 
obtained  by  using  a  single  cell.  This  would  mean  winding  the 

Hr,  Edison  #2 


coil  for  the  low  voltage  of  the  c,ell.  Inasmuch,  however,  aB  we 
would  expect  to  have  a  little  switch  between  the  cell  and  the 
coil  to  be  automatically  operated  by  the  approach  of  the  sub¬ 
marine,  so  that  the  battery  would  be  active  only  when  the  magnet 
was  required  to  be  magnetized,  I  am  inclined  to  think  that  a  some 
what  higher  voltage  Bhould  be  used,  in  order  to  reduce  the  ef¬ 
fect  of  contact  resistance  of  the  switch.  I  think  perhaps  we 
ought  not  to  figure  on  using  less  than  -  say  6  volts,  which,  as 
I  understand  it  would  require  about  10  Edison  Primary  cells. 

Will  you  be  kind  enough  to  let  me  know, 
therefore,  the  approximate  dimensions  and  weight  of  a  battery  of 
10  Edison  Primary  cells  capable  of  delivering  11  watts  for  36 
hours  before  it  began  to  fail? 

/  As  I  understand  it,  these  cells  canbe  sealed 

7  up  and  will  operate  in  any  position.  This  is  very  important, 

(  and  if  there  is  any  doubt  about  it  I  should  like  to  know. 

Will  you  also  be  kind  enough  to  let  me  know 
what  is  the  lowest  temperature  at  which  these  cells  can  be  de¬ 
pended  upon  to  operate.  They  would  have  to  operate  at  a  tem¬ 
perature  as  low  as  that  of  freezing  sea- water,  whatever  that 
temperature  may  be. 

Very  truly  youas, 

7  , 

~pn  Mlfaoitij  km/. 
avj\  itnrl^b  on  I  In  r'cJrii— 

S  Ui  wdl  jm  J^v  injmm  ~ 
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~t<-  *<z-c<^  PU 

OUly  2  6,  19.17 

lord  Dor thcliffe , 
Hotel  uotham. 

Hew  York,  II. Y. 

Uy  dear  Dor thcliffe; 

Cannot  bring  model  as  it  is 
wanted  by  the  Cunard  Engineers  and  the  Submarine 
Defense  Committee.  However,  I  am  enclosing  two 
photographs,  which  will  give  you  the  idea. 

The  present  area  of  active  operations  is  in 
a  lino  drawn  from  Wexford,  Ireland  to  Cherbourg, 
France ,  out  200  miles  from  lands  end.  Ihis  is  an 
area  of  122,000  circular  miles. 

The  area  of  visibility  of  ships  to  a  submarine 
is  on  account  of  smoke,  1600  circular  miles,  require 
ing  76  Submarines. 

If  200  tonB  of  American  or  Welch  anthracite 
is  used  on  a  trip  .to  and  from  America  and  only  in 
the  Danger  Zone,  there  will  be  no  smoke,  and  the 
area  of  visibility  is  reduced  from  1600  to  400  cir¬ 
cular  miles,  requiring  Submarines. 

If  now  the  masts  are  romovod  and  the  stack 
reduced  to  a  little  less  than  half  its  height,  the 
area  is  still  further  reducod  to  ‘144  miles,  require 
ing  as  far  as  visibility  is  concerned,  840  Submarines, 

If  the  canvas  sides  are  used,  the  area  is 
still  further  reducod  and  accuracy  of  torpedo  fire 
is  imparled. 

In  conclusion,  the  most  important  thing  iB 
"Stop  the  Smoke",  ana  if  I  had  anything  to  Buy  there 
would  not  be  a  freight  steamer  leaving  Dew  yorlc  withS 
out  200  tons  of  anthracite,'  and  as  for  the  latter  they 
can  put  it  in  in  24  hours. 

Yours  sincerely. 


Xdj 4f_ 

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l!r.  Edison- 

Ur .  Beer  b  '  phoned  in  a8  follows  ; 

The  Cunard  Co.  is  working  With 
all  their  force  to  installing  i,’j .  Edison’s  devices  on  a 
vessel  which  is  to  leave  as  soon  as  the  alterations  are 
complete.  This  will  be  with  the  idea  of  furnishing  a 
model  for  use  in  equipping  other  vessels.  t;r.  Edison's 
Engineer,  !.:r.  iVolfe ,  is  vnrking  with  our  Engineering  and 
Dock  force  today  and  he  will  report  fully  to  !.;r.  Edison 
what  iB  being  done.  All  of  the  Shipping  people  here 
realize  the  great  importance  of  this  and  we  are  all  working 
as  hard  and  as  fast  as  we  can  on  it.  It  is  the  wish  of 
the  Cunard  Co.  to  have  this  vessel,  which  is  now  being 
fitted  v/ith  i.’r .  Edison's  devices,  fully  equipped  with 
all  those  things  which  he  suggested  to  the  Cunard  people, 
and  the  latter’s  entire  working  force  so  far  as  is  necessary 
are  wor-  ing  on  it . 

July  2D.  1917. 

Thomas  A.  Edison,  Esq., 

Edison  Laboratory, 

Orange,  N.  J. 

Submarine  Defense  Association. 

Dear  Sir:- 

On  Wednesday,  the  llith ,  you  asked  me  some  questions 
as  to  vessels  and. on  going  over  the  matter  with  my  clients, 
the  Cunard  Company,  I  wrote  you  on  JulyJ9th,  sending  such 
information  as  I  could  then  obtain,  Kr.  Sparks,  the  agent  of 
the  Company,  saying  that  he  would  obtain  some  figures. 

He  obtained  these  and  wrote  me  about  them  on  the  20th,  and 
1  enclose  his  letter,  though  I  think  you  will  already  have  had 
this  information  direct  from  the  Cunard  Company  while  I  was 
in  Washington. 

As  I  have  telephoned  you  to-day,  the  Cunard  Company 
are  proceeding  at  top  speed  to  equip  one  of  their  vessels  now 
in  port  with  the  devices  which  you  have  suggested.  The  pre¬ 
liminary  plans  for  the  work  had  already  been  decided  upon  and 
I  was  at  the  Cunard  office  in  conference  with  ISr.  Sparks  and 
his  head  engineer  and  the  captain  of  the  vessel  which  is  to  be 
used,,  when  your  l£r.  Wolf  came  with  the  model.  I  can  assure 
you  that  all  of  us  here  realize  to  the  full  what  your  sugges¬ 
tions  mean  in  securing  safety  to  shipping  and  the  Cunard  force 

T.A.E.  -2- 

are  working  as  hard  and  fast  as  possible. 

What  counts  most  is  to  have  these  devices  actually 
put  into  use  and  it  is  to  this  that  the  Cunard  Company  is  bend 
ing  its  energies,  with  a  view  not  only  to  protecting  Cunard 
Bhips  but  of  making  a  demonstration  for  the  benefit  of  other 
vessels  of  the  Allies. 

At  my  request,  Ur.  Wolf  telephoned  you  about  the 
apparatus  you  are  having  made  to  improve  the  vision  in  a 
strong  light,  and  I  understood  from  him  that  some  of  these 
would  be  ready  for  us  to-morrow.  He  was  also  going  to  ask 
you  about  having  constructed  for  us  some  of  the  side  peri¬ 
scopes,  so  as  to  bring  the  periscope  of  the  submarine  on  the 
sky  line. 

Please  call  upon  me  to  help  in  any  way  where  you 

1  help  in  this  matter. 

Faithfully  yours , 


Dear  Mr.  Edison:- 

I  have  to  thank  you  for  your  kind  letter 
of  July  twenty-first  and  as  you  know  we  are  adopting  all 
the  suggestions  you  have  made  us  on  the  S/s  "Valeria",  in¬ 
cluding  the  Bupply  of  the  necessary  anthracite  ooal  to 
take  her  through  the  submarine  zone.  I  feel  confident 
that  your  suggestions,  based  as  they  are  upon  that  most 
valuable  of  all  qualities,  oommon  sense,  will  prove  of 
very  great  value  not  only  to  us  but  to  the  merohant 
marine  as  a  whole,  and  therefore  to  the  entire  Allied 
cause,  and  I  want  you  to  understand  how  very  muoh  we 
appreciate  the  time  and  thought  that  you  are  giving  to 
this  subject. 

Sincerely  yours, 

Chomas  Edison,  Esq., 

Orange,  N.J. 



arrangements  are  necessary  regarding  boat 



cE1.ephg«s  ^  ^  £  /;  ?«r  * 

t^rNE_"Ti34  s^***^'  r~ 

July  25,  1917. 

^  (2- 

Messrs .  Edison  &  Co., 

West  Orange,  IT.  J. 



When  Mr.  EdiBon'e  men  were  at  the  Casino 
at  Eagle  Rook,  they  left  a  drum  of  chemicals.  It 
ie  in  the  way  of  the  licensee  and  he  is  rather  afraid 
of  it  as  he  does  not  know  what  it  contains.  Will  you 
please  have  it  sent  for  promptly. 

Very  respectfully, 

July  £6,191 

Ur.  Ji.  H.  Booro, 
c/o  Lord,  Day  £:  Lord, 

49  Kail  gtroot. 

Bow  York,  II. X. 

Boar  II r.  Boers: 

I  am  oondine  you  herewith  photo  of 
one  of  our  smoko  raakoro.  I  have  nine  raon  working 
on  thin  problem  to  develop  a  practical  one  that  can 
b.  produced  choaply,  and  ono  that  will  raquiro  mini¬ 
mum  of  supplies. 

Yours  very  truly,. 





<s<*^  '■^' 

^  k^trs.  W^-** 





Orlando  Roulana.,_ - __ - — - - - 

Onteora,  Eannersville ,  H.x. 

- - -  '  —  If  you  have  time  wo ul a  like 

you  to  come  over  to  laboratory  .on  important  experiment 
.  for  the  Government.  ; 

Given  to  Operator  M.J.  9:30  A  .11. 




.  —  -  - >  ■  7^y  , 


•  ~  tP. 




^M,  &>T- 

fe7  ZJ*  (ZCA^-S  </cA^  A^-ri  tsv,. 





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(PL^J  C> 

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MC^rvJtc  Ch  ^  .  PCuM?  c//Ut^ 



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(  (yuv^s° 

Iavail  C«ii;rffiG  Board 



13  Park  Row,  New  York 
July  26',  1917- 

To  the  Members  of  the  llaval  Consulting  Board, 

Dear  Sirs: 

Please  he  advised  that  the  next  meeting  of  the  Board 
will  he  held  August  4,  1917,  in  the  Carnegie  Institution  at 
Washington,  D.  C. 

In  accordance  with  the  resolution  passed  at  the  last 
meeting,  the  informal  meeting  of  the  Board  begins  at  nine  A. It., 
and  the  formal  meeting  begins  at  ten. 

Very  truly  yours, 

Hjseva*  €«swmtmg  Boms® 



13  Park  Row,  New  York 

July  36,  1S17. 

To  the  members  of  the  Naval  Consulting  3oard: 

Dear  Sirs: 

I  enclose  herewith  for  your  information 
a  list  of  the  names  and  addresses  of  the  members  of 
the  Naval  Consulting  Board,  together  with  list  of 
the  committees  as  at  present  constituted.  Please 
destroy  previous  lists. 

Very  truly  yours. 



.  ...  OFFICERS 

PRESIDENT..;.,..-. . ;  Thomas  A.  Edison, 

VICE-PRESIDENT . Dr.  Peter  Cooper  Hewitt, 

CHAIRMAN'. . .  W.  L.  Saunders, 

SECRETARY . Thomas  Robins. 

LAWRENCE  ADDICKS,  126  Liberty  St.,  N.Y.City,  Tel.  Rector  3930, 

Res.,  3  Beechwood  PI.',  Elizabeth,  N.J.,  Tel.  Elizabeth  3284. 
BION  j.  ARNOLD,  105  South  LaSalle  St.,  Chicago,  Ill. 

DR.  L.  H.  BAEKELAND,  Harmony  Park,  Yonkers,  N.Y.,  Tel.  Yonkers  3436, 

N.Y. Office,  General  Bakelite  Co.,  100  William  St,, 

Tel,  John  1640. 

HOWARD  E.  COFFIN,  Counoil  of  National  Defense,  Munsey  Building, 
Washington,  D.C. 

ALFRED  CRAVEN,  .375  Park  Ave.,  Yonkers,  N.Y.,  Tel.  Yonkers  1444. 

THOMAS  A,  EDISON,  Laboratory,  W.  Orange,  N.J.,  Tel.  Orange  907, 

Res.,  Llewellyn  Park',  W.  Orange,  N.J.,  Tel.  Orange  257, 

W.  L'.  R,  'EMMET,  General  Eleotric  Co.,  Schenectady,  N.Y. 

DR.  P.  C.  HEWITT,  18  E.  33d  St.,  N.Y.City,  Tel.  Vanderbilt  825, 

Res.,  11  Lexington  Ave.,  N.Y.City,  Tel.  Grammercy  3205. 

A,  M,  HUNT,  United  States  Shipping  Board,  Interstate  Building, 

Washington,  D.C., 

55  Liberty  St.,  N.Y.City,  Tel.  Cortland  4389, 

Res.,  Bordeaux  Apartments,  549  Riverside  Drive,,  N.Y.City, 

Tel.  Mornings ide  4960. 

DR.  M.  R.  HUTCHISON,  Edison  Laboratory,  W. Orange,  N.J.,  Tel.  Orange  907, 
Res.,  Llewellyn  Park,  W, Orange,  N.J.,  Tel.  Orange  4710. 

B.  G.  LAMME,  Westinghouse  Eleo,  &  Mfg.  Co.,  East  Pittsburgh,  Pa., 

Tel.  Hiland  1582  (Bell  telephone). 

HUDSON  MAXIM,  Maxim  Park,  Landing,  N.J.,  Tel.  Hopatoong  36, 

698  St.  Marks  Ave.,  Brooklyn,  N.Y.,  Tel.  Bedford  2315. 

SPENCER  MILLER,  96  Liberty  St.,  N.Y.City,  Tel'.  Rector  2110, 

Res.,  217  Turrell  Ave.,  So. Orange,  N.J.,  Tel.  So. Orange  771. 
♦PROF.  JOS.  W.  RICHARDS,  Lehigh  University,  South  Bethlehem,  Pa. 

ANDREW  L.  RIKERj  Locomobile  Co.  of  America,  Bridgeport,  Conn., 

Res.,  Fairfield,  Conn.' 

THOMAS  ROBINS,  13  Park  Row,  N.Y.City,  Tel.  Cortland  8600, 

Res.,  Shippan  Pt.,  Stamford,  Conn . ,  Tel.  Stamford  159. 

W.  L.  SAUNDERS,  11  Broadway,  N.Y.City,  Tel,  Bowling  Green  8424, 

Res.,  4  W.  40th  St.,  N.Y.City,.  Tel.  Vanderbilt  2227. 

M.  B.  SELLERS,  801  N.  Arlington  Ave.,  Baltimore,  Md. 

ELMER  A,  SPERRY,  40  Flatbush  Ave .Ext. ,  Brooklyn, N.Y.,  Tel.  Main  9700, 
Res.,  1505  Albemarle  Rd.,  Brooklyn,  N.Y.,  Tel.  Flatbush  34. 

FRANK  .J.  SPRAGUE,  165  Broadway,  N.Y.City,  Tel.  Cortland  3806, 

Res.,  241  West  End  Ave.,  N.Y.City,  Tel.  Columbus  2306. 

B,  B,  THAYER,  42  Broadway,  N.Y.City,  Tel.  Broad  1436, 

;  Res.,  46  E.  79th  St.,  N.Y.City,  Tel.  Lenox  7506. 

DR-.  A’)  G/  WEBSTER,  dark  University,  Worcester,  Mass. 

DR;  W,  R.  WHITNEY,  General  Electric  Co.,  Schenectady,  N.Y. 

DR.  R.  S.  WOODWARD,  Carnegie  In6t.  of  Washington,  Washington,  D.C. 

♦Prof.  Riohards'  address  till  further  notioe.  Room  612,  Navy  Dspt. Annex, 
Washington,  D.C. 



AERONAUTICS ?  INCLUDING  AERO  MOTORS:  Chairman  Elmer  A.  Sperry, 

- - Bion  J.  Arnold,'  KowurTTE.  Coffin,  B.C. Hewitt, 

Andrew  L.Riker,  M.B. Sellers,  A.G.Wehster. 
aids  TO  NAVIGATION:  Chairman,  Elmer  A.  Sperry, 

—  Alfred  Craven,  A.M.Hunt,  R.S. Woodward. 

RY  ANB  PHYSICS:  Chairman,  W.R.  Whitney, _ .  . 

Lawrence  Addicts,  L.H. Baekeland,  Jos.W.Riohards, 

M.B. Sellers,  A.G.Wehster,  K.S. Woodward. 

ELECTRICITY;  Chairman,  Prank  J,  Sprague, _  __  T _ 

Lawrence  Addicks,  W.B.B. Emmet,  P.C. Hewitt,  B.G.laiiHne, 
A.G.Wehster.  ,  ,  . 

tpood  AND  SANITATION:  •  Chairman,  1.  H.  Baekeland, 

- Hudson  Maxim,  B.B. Thayer,  W.R. Whitney, 

twtrrnat.  COMBUSTION  MOTORS:  Chairman,  Andrew  L.  Riker, 

Howard  E.  Oof fi5T  M.B. Sellers,  E.A.Sperry. 

BIPE  SAVING  APPLIANCES:  Chairman,  Spencer  Miller, 

—  Hudson 'Maxim,  Themas  Rohins. 

METALLURGY:  Chairman,  Jos.  W.  Richards^ _  m  _ 

•  Lawrence  Addicks,  B.G.Lamme,  B.B. Thayer,  W.R.Whitney. 

MINES  AND  TORPEDOES:  Chairman,  Elmer  A.  Sperry, _  _ 

—  - L.H. Baekeland ,  M.R. Hutchison,  Hudson  Maxim. 

OPTICAL  GLASS:  Chairman,  L.  H.  Baekeland, 

- — JosTW. Richards,  A.G.Wehster,  W.R.Whitney. 

ORDNANCE  AND  EXPLOSIVES:  Chairman,  Hudson  Maxim, 

—  L,H.  Baekeland,  A. M. Hunt,  M.R.Hutclhison, 

Prank  J. Sprague,  A.G.Wehster,  W.R.Whitney, 

production! Organization ,  manupacture  anb  standardization: 

—  Chairman^  Howard  E.  Coffin, 

Lawrence  Addioks,  W. L.R. Emmet ,  B.G.Lamme, 

Thomas  Rohins,  W.L. Saunders,  B.B. Thayer-  WORKS.  YARDS  AND  DOCKS:  Chairman,  B.  B.  Thayer, 

- Lawrinoe  Addicks,  Alfred  Craven,  A. M. Hunt, 

Spenoer  Miller,  Jos.W.Riohards. 

SHIP  CONSTRUCTION:  Chairman,  Prank  J.  Sprague 

•  - A.M.Hunt,  M.R. Hutchison,  Spencer  Miller, 

Jos .W. Richards. 

SPECIAL  PROBLEMS:  Chairman,  B.G.  Lamme, 

—  Lawrence  Addicks,  A.M.Hunt,  M.R.Hutchison, 

M.B. Sellers,  E.A.Sperry,  Prank  J. Sprague, 

A.G.Wehster,  W.R.Whitney.  . 


- WTOfTEuimoi ,  B.G.  Lamme,  Jos.W.Eichards, 

M.B. Sellers. 

SUBMARINES:  Chairman,  W. L.R. Emmet , 

lb  -  ■— f.M.Hunt ,  M.R.Hutchison,  W.L.  Saunders , 

Prank  J. Sprague,  . 

TRANSPORTATION:  Chadrman.  Bion  J.  Arnold, 

■— Hb  ni  u^offin  Alfred  Craven,  Spencer  Miller, 

A.LiRi ker.’  Thomas  Bohans,  W.L. Saunders ,  B.B. Thayer... 
wtrnt.ESS  AND  COMMUNICATIONS:  Chairman,  B.  C.  Hewitt, 

—  - “A.G.Wehster"!  W7R  -  Whitney . 

JUly  27,  1917, 

Ur.  Alonzo  Chur oh,  Seo. 

Essex  County  Park  Commission, 

#,810  Broad.  Street, 

Newark,  N.J. 

Uy  dear  Ur.  Church: 

I  liavo  received  your  favor  of  the  25th  inat., 
regarding  the  drum!  left  at  the  Casino  by  our  men.  I  immediately 
took  it  up  with  our  uaintenanoe  Department,  who  I  understand  have 
sent  an  automobile  up  yesterday  afternoon  for  same. 

With  renewed  thanks  for  your  past  hearty  co¬ 
operation  and  regretting  the  oversight  in  leaving  the  drums  at 
the  Casino,  I  remain 

Yours  very  truly. 

Assistant  to  Ur.  Edison. 


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LOR  D.  DAY  &  LORD 


July  27th,  1.917. 

Thomas  A.  Edison,  Esq., 

Orange,  New  Jersey. 

Pear  Mr.  Edison:- 

I  acknowledge  with  thanks  your  favor  of  yesterday, 
enclosing  photograph  of  one  of  your  omoko  makers,  which  is  moot 
interacting,  and  which  I  will  take  up  immediately  with  my  people. 

You  spoke  of  possible  objection  on  thp  part  of  the 
Navel  Authorities.  In  May  last  I  called  on  Secretary  Daniels 
with  Mr.  Sprague,  of  your  Advisory  Board,  and  Mr.  Daniels  author¬ 
ised  Mr.  Sprague  to  let  me  have  any  information  which  the  Advis¬ 
ory  Board  had  which  would  help  along  in  our  efforts  to  protect 
merchant  ships.  He  also  sent  for  Admiral  Taylor  and  gnve  him 
the  same  direction. 

On  Friday  of  last  week  I  was  in  Washington  and  dis¬ 
cussed  our  plans  for  the  protection  of  merchant  vessels  with 
Senator  V-i-itzhmrtn ,  Chairman  of  the  senate  Committee  on  Naval  Affaire, 
also  with  Mr,  Daniels  and  Admiral  Benson.  Thqy,  particularly 
Admiral  Benson, talked  freely  about  these  matters  and  seemed  to  recog¬ 
nise  that  we  have  no  axe  to  grind  but  were  merely  trying  to  spend 
our  ovm  time  and  money  on  our  own  vessels  to  the  best  advantage 
so  as  to  make  as  quick  progress  as  we  could  in  developing  the  art 
of  combatting  the  submarine. 

On  hearing  from  you  yesterday  that  you  were  ready 
to  see  the  Engineer  whom  our  association  ia  to  send  to  your  l&borevtory , 

Thomas  A.  Edison,  Esq.— --2--- 

I  hod  v.'ord  sent  to  him  immediately,  as  he  hod  been 
hear  v/hsn  it  would  be  agreeable  to  you  to  have  him 
Faithfully  yours. 



ThOB .A .Edison, Esq . , 

West  Orange, N.J. 

July  27.1917* 

Dear  Kr.Edison:- 

The  Secretary  of  the  Navy  has  plaoed  at  my  disposal 
an  emergenoy  fund of  twenty-five  thousand  dollars  ($25,000).  This  is 
to  be  used  in  Naval  Consulting  Board  experimental  work. 

A  part  of  this  fund  -  ten  thousand  dollars  ($10,000), 
is  available  in  oash  as  free  capital. 

this  money: 

The  following  rules  will  govern  the  expenditure  of 

1.  The  Chairman  of  a  committee,  or  an  individual 
member  of  the  Board,  must  get  the  approval  of  the  Board  for  an  expendi* 
ture.  This  must  be  done  either  by  Resolution  at  a  regular  meeting  or  . 
on  request  made  through  the  Secretary  of  the  Board  it  oan  be  scoured  in 
oase  of  emergenoy  by  letter  ballot. 

A  maximum  figure  or  a  budget  must  aooompany  the 


After  approval  the  Chairman,  or  the  individual,  should 
notify  me,  in  writing,  at  11  Broadway,  New  York,  that  the  Board  has 
approved  a  oertain  experiment  at  an  expenditure  of  a  certain  amount 
and  that  he  is  going  ahead  with  it,  with  the  understanding  that  I  will 
see  that  the  expenditures  are  paid  out  of  this  fund. 

The  oonduot  of  all  experimental  work  will  be  under 
the  direotlon  of  the  Chairman  of  a  committee,  or  of  an  individual  so 
delegated.  They  will  be  solely  responsible  for  all  matters  pertaining 
to  the  experiment.  No  reports  of  a  scientific  nature,  either  to  me 
or  to  the  Board,  need  be  made,  unless  specially  called  for.  Even  then 
the  Chairman,  or  the  individual,  has  the  right  to  objeot  on  grounds 
of  public  interest. 

2.  Financial  reports  of  expenditures  need  not  be 
made  until  the  completion  of  the  experiment. 

3*  Requisitions  for  money  should,  preferably  be 
made  weekly  or  monthly,  in  the  shape  of  vouchers.  These  vouohere 
should  be  made  out  as  commercial  bills  are  usually  made,  giving 
details,  prioes,eto. 

All  bills  or  vouohers  should  be  submitted  in 
duplicate,  each  bearing  the  following  notation: 

"Certified  oorreot  and  just; 
payment  not  received." 

This  olause  must  be  inserted  over  the  signature 
of  the  person  rendering  the  service,  or  if  a  corporation  it  must  be 
over  the  title'-of  'the  corporation,  followed  by  the  signature  of 
Borne  offioer  of  the  corporation  authorized  to  sign  the  corporation’s 

All  bills  must  be  procured  and  sent  to  the  Chairman 
of  the  Committee,  or  individual,  conducting  the  experiment.  He  must 
see  to  it  that  they  are  oorreot  and  properly  certified  and  then  they 
should  be  sent  to  me.  From  that  time  it  is  up  to  me  to  Bee  that 
payment  is  promptly  made.  Government  oheokB  will  be  made  to  the 
individual  or  corporation  signing  the  invoices,  but  these  oheokB  will 
be  sent  by  me  to  the  Committee  Chairman  or  the  individual  of  the 
Board.  I  have  no  contact  or  oonneotion  with  those  sending  bills. 

5.  While  it  is  more  simple,  avoids  oonplioations 
and  bookkeeping  to  pay  on  invoioes,  a  certain  amount  of  free  oash  is 
available  where  the  individual  or  corporation  doing  the  experimental 
work  signifies  that  it  is  necessary  to  have  this  cash  in  order  to 
properly  oonduot  the  experiments.  The  Committee  Chairman  or  individual 
of  the  Board  must  decide  where  it  is  so  necessary  or  desirable.' 

6.  Where  free  oash  is  wanted  the  Committee  Chairman 
or  Individual  must  write  me  a  letter  asking  for  a  definite  sum,  whioh 
he  must  state  is  to  be  a  part  of  his  budget  sum.  He  should  give  in 
that  letter  his  reasons  for  asking  for  cash  in  advance. 

7«  All  of  the  foregoing  pertains  only  to  the 
speoial  sum  placed  by  the  Secretary  of  the  Navy  for  my  disposal.  It 
has  no  referenoe  to  expenditures  now  being  made  direotly  through 
Government  sources. 


Lucius  H.  Boers, Esq-, 
c/o  Lord,  Day  and  Lord, 

49  Wall  St., 
lieu  York,  li-Y. 

Uy  dear  Hr.  Boers: 

Ur.  Edison  asked  mo  to  tolophono  you 
the  following  messaro- thic  morning,  but  your  office  ’phoned 
mo  in  roply  that  you  would  not  be  in  today.  Tho  nocsago 
is  ub  follows: 

"Ask  Standard  Oil  Company  to  send 
mo  a  barrel  of  each  kind  of  oil  w hich  lias  higher 
boiling  points  tlian  their  straw  oil.  'fry  .and 
have  it  sont  from  aroiuid  How  York,  as  X  want  it 

You  should  worn  a31  cargo  ohlpponginccrc 
to  soo  that  their  crank  pin  and  shaft  boros  do 
not  pound  or  moke  any  unnecessary  noiso,  which, 
can  bo  provontod  by  tolling'  up  and  uso  of  extra 
oil  while  running  in  Danger  Lone.  ily  oxporinonis 
at  Sandy  Hook  provoo  that  the  onemy  cannot  hoar 
tho  sorov.  itself,  oxcept  a  very  short  distance, 
but  tho  sharp  sounds  of  bad  pounding  bearings ,otc . 
can  bo  hourd  at  night  when  Submarine  is  motionlosc 
on  top  for  a  distanco.  of  7000  yards. 

Those  precautions  will  probably , save  a 
chip  now  and  thon." 

Yours  very  truly. 



'M  . 

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British  War  Mission 


Dutton  Building, 

681  Fifth  Avonue, 
New  York  City. 

Uy  dear  Edison, 

Your  fascinating  photographs  and  description  interested 
me  greatly,  and  I  took  the  liberty  of  sending  them  to  Admiral 
Sir  Eric  Geddes,  tho  very  able,  young  head  of  our  Navy. 

I  hope  you  will  let  me  know  of  any  progreBB  you  make . 

Thos.  A.  Edison,  Esq.  July  28th,  1917. 

July  30,1917. 

Lir.  L.  H.  Boors,, 
c/o  Lord,  Day  a  Lord, 

49  Wall' Street, 
liors  York,  Ii.Y. 

Doar  Ur.  3oors : 

Horowith  I  aond  you  throe  photographs 
of  a  smoko  producing  projectile  which  can  ho  fired  from 
the  regular  3-  or  4  inch  .guns  notion  tho  boats.  Che  cub- 
stonco  which  1  use  1b  very  cheap. 

for  making  tho  smoko,  I  use  what  is  known  in 
tho  Chomical  trado  as  Oloum  20$a.  It  consists  of  con¬ 
centrated  sulphuric  acid  in  which  is  dissolved  2i>J-  of 
sulphuric  anjifldrido  SO3. 

Ehe  explosion  of  tho  shell  atomises  tho  liquid • 
Oloum  is  north  about  ono  and  throo  toivths  conts  per  pound; 
You  will  note  instead  of  very  expensive)  explosives,  I  use 
tho  lowest  grade  of'dynamito  which  is  used  in  .'..uarrio:: ,  to 
wit,  20;^,  worth,  1  think,  about  13  to  16  cents  per  pound. 

2ho  object’ of  those  shells  on  morchant  chips 
is  for  tho  nurposo  of  blinding  tho  Submarino  and  stop 
pun  firo  on*  tho  ship  to  give  doiay  for  tho  destroyer  to 
roach  hor  from  piroloss  signal. 

If  you  will  to3:e  this  raattor  up  with  tho  L’aval 
authorities,  thoy  would  undoubtedly  have  supply  of  shells 
made  up,  oven  if  tho  guns  cro  of  British  size.  With  a 
supply' of  theso  shells,  in  addition  to  regular  shells,  tho 
gunnors  could  blind  tho  Submarine  and  provant  boing  shot 
at.  2ho  Captain  oouia  thon  chiongo  his  course  many  times 
and  in’  many  airoctiono,  and  also  blind  any  other  area  '.hat 
in  his  judgoiaont  tho  Submarino  might  ontor  to  got  out  of 
tho  smoko  area.  I  am  ready  to  givo  tho  Govorrimont  all 
tho  data.  If  thoy  are  to  delay,  I  will  design  a  shell 
myuolf  aria  got  bidB  for  manufacturing  thorn  from  outside 
people  for  the  Shipping  Companies,  providing  XIaval  auth¬ 
orities  permit  thair  ueo  in  the  guns. 

■  i'o  a  luymnn  thero  would  appoar  to  bo  no 
difference  botwoon  oithor  Ilavy  or  thooo  smoko  Bhcflc. 
Accuracy  of  firo  is  not  at  all  nocossary. 

llo  Gunner  on  a  Submarine  could  stand  thoco 
fumes  and  it  is' likely  that*  it  would- cat  tip  any  eae 

Yours  very  truly. 

Enclosures . 



V  ' 



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July  30,1917. 

Boar-Admiral' Goo.  E.  Burd, 

Brooklyn  Havy  Yai-d,  - 

Brooklyn,  II  .Y. 

My  dear  Admiral: 

At  Mr.  Edison's  roquost,  I  am  Bonding 
you  herewith  two  enapshotB  of  lioaro .  Henry  G.  i.olfo  and 
Vim.  II.  Knierim,  two  of  Ilr.  Edison's  or-porinentorc ,  and 
who  generally  go  along,  with  Hr.  Edison  on  his  various 
trips  on  account  of  Govommont  work.  ' 

Hr.  Edison  asks  if  you  will  kindly  have  Envy 
Yard  pacsos  issued  in  favor  of  those  moil.'  Ehoy  have  boon 
with  him  evor  sinco  tho  start  of  his  "campaign". 

Shanking  you  in  advance  for  tho  courtesy,  I 


.  Yours  vary  truly. 

Assistant  to  Hr.  Edison. 

Enclosuros . 

July  30,1937. 

Uujor  IkUlph  D.  Mershon, 

00  liaidon  lane, 

IIOV7  York,  H.Y. 

Dour  Hr.  Uorshon: 

Your  favor  of  the  24th  instant,  subject 
Uagnet  Bomb,  to  Ur.  Edison  lias  booh  rocoivoO .  Ho  immediately 
referred  sano  to  our  Superintendent  of .the  Primary  Battery 
Division  to  anew or  your  aucrics  in  detail,  to  which, ho  hue 

Herewith,  I  am  bonding  you  his  report,  which,  is 
self-explanatory,  in  accordance  with  Hr .  Edison's  note  thereon. 

Ae  already  adviced  you,  should  wo  bo  able  to  be 
of  further  service,  wir&will  be  plonsod  to  hoar  from  you. 

Yours  vory  truly. 

Assistant  to  i!r.  Edison.  . 


July  30,1917 

Shorwin  Williams  Co.,  . 

IIOTjark,  II. J. 


I  am  doing  somo  experiments  for  tho 
■  Government  on  paints,  and  v:rlto  to  ask  if  you  have 
any  simple  caret,,  or  book,  or  if  tharo  is  a-  tintometer, 
whereby  I  could  compare  tints  or  shades  of  colors. 

>  If  so,  could  you  loandmo  onov 

Tours  voiy  truly,  ,  • 

,  's&b'/a  ' 


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2crt^'~petJ^x  < 


My  dear  I.Ir.  Headowcrof  t: 

la  one  of  our  recent  conversations,  Mr 
Edison  mentioned  that  he  had  a  combination  or 
liquid  which  would  fog  the  periscopes  of  sub¬ 
marines  as  they  submerged  and  said  that  he  had 

manufactured  some  and  sent  abroad. 

Could  I  obtain  from  you  a  sample  large 
enough  to  experiment  with  in  conjunction  with 
other  materiel  of  this  nature  which  to  are  get- 
together  for  test  at  Ilew  London? 

Very  truly  yours. 

Mr.  Yta.  H.  Headoweroft, 
Edison  Laboratories, 
Orange,  H.J. 

:  \&\r 

etting  j  ^  b 

4«a>  i>t-< 

.jit*11  Company 

,  // ^  ^ 

Sl£*“ Oo-  ^ij/^ 

"  ”  ATTEHTIOH:  Mr.  Them.  Edison  If 

My  dear  Sir:- 

I  deemed  it  a  pleasure  of  having  the  privilege  of 
meeting  you  and  talking  over  tha  matter  that  you  requested  us 
to  figure  on  for  the  merchant  marine. 

i  for  the  merchant  marine. 

I  am  pleased  to  give  you  a  rough  figure  along  the 
lines  of  my  conversation,  as  follows:-  As  near  as  we  can  estimate 
the  tools  and  punohings  of  various  kinds  will  he  $90.00,  cost  to 
us.  The  apparatus  itself.  I  do  not  know  what  you  would  call  it, 
will  estimate  from  $2.00  to  $2.25  eaoh,  depending  on  production 
and  quantity,  1000  to  6000,  and  the  simplicity  we  can  work  out  in 
the  manufacture. 

As  per  your  instructions  we  are  making  up  the  small 
end  pieoe,  riveting  on  some  felt  to  see  how  it  works  out  for  con¬ 
sideration.  We  figure  that  it  would  he  wise  to  make  these  of  tin 
owing  to  the  soldering  on  the  inside.  Will  he  obliged  t&-use  a 
blow  torch  with  a  long  projection  to  do  the  soldering.  Tin  is 
very  high,  as  we  all  know,  and  we  are  using  our  regular  lx  stock. 
Japan  finish,  as  per  inderstanding,  would  he  absolutely  dead  black 
on  the  inside  with  a  good  finish  on  the  outside,  baked. 

I  will  be  very  much  pleased  to  follow  this  up  with  a 
personal  call  again  to  see  if  we  can  get  together  for  our  mutual 

Again  appreciating  the  privilej 

P  meeting  you,  remain 

Yours  very  truly, 



^AVAIL  CdWSfllffiG  BOAffiD 



til  Pahk  Row.  New  York 

To  the  Members  of  the  Haval  Consulting  Board, 

Bear  Sirs: 

At  the  last  meeting  the  Board  extended  an  invitation 
to  the  Submarine  Defense  Association  to  appear  by  committee 
before  the  Board  at  its  meeting  on  August  4,  in  order  to  arrange 
for  complete  cooperation  between  the  two  bodies. 

The  Submarine  Defense  Association  is  unable  to  accept 
this  invitation  on  account  of  other  engagements  of  its  members, 
and  therefore  an  informal  conference  has  been  arranged, 
at  the  office  of  Mr. 

Thursday,  August  3. 

srB,  11  Broadway,  at  10:15  A.M. , 
Very  truly  yours'. 


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L>c  g,.  1 4jU&**+  — ■ 

Ur*  Lieb  'phoned in  as  follows: 

"I  think  that  there  is  coal 

enough,,  so-called  semi-anthracite  available  in  England, 
that  would  take  care  of  the  other  end  of  that  situation, 
but  there  is  some  little  difficulty  in  always  getting  a 
supply  of  that  particular  type  of  coal,  available  in  the 
various  ports  where  these  steamers  are  likely  to  land. 

If  these  ships  went  to  points  around  Wales  they  would 
perhaps  get  a  supply  there  at  any  time,  but  as  they  are 
likely  to  call  at  Liverpool,  London,  Glasgow  or  some 
other  point  it  may  perhaps  be  a  little  difficult  to  get 
this  pa±ticular  type  of  coal. 

In  the  case  of  Coke  u#e»ot  -  that  would 
apply  .to  ordinary  coke  as  well  as  gas  oven  coke.  -  If 
these  are  forced  too  much,  there  is  likely  to  secondary 
combustion  in  the  boilers  and  this  is  liable  to  make  flames 
come  out  of  the  stack,  which  he:  thinks  vi  11  bo  worse  than 
smoke . 

Ho  would  like  to  send  his  Chief  Engineer  over 
to  talk  this  matter  over,. if  you  only  want  him  to  send  him 

Ur.  3dison: 

•Ur.  I.ieb  says  gas  hous  coke  lends  itself  very 
poorly  to  forcing.  'i’ho  minute  you  put  forced  draught  on 
it  you  blow  holes  in  the  coal  bed  and  it  is  impossible  to 
got  any  overload  out  of  it.  It  is  to  be  noted,  also,  that 
there  is  always  a  considerable  amount  of  moisture'  in  the  coke 
mad  there  is  apt  to  be  a  light  gray  haze  from  it,  represent¬ 
ing  greater  visibility  than  the  products  of  combusion  of 
anthracite  coal.  Another  thing,  of  course,  it  is  very- 
much  more  bulky  for  the  same  heat  value.  V/e  have  had 
considerable  experience  over  here  in  operating  and  burning 
gas  house  coke  because  we  have  been  burning  10,000  tons 
every  month  and  we  think  it  is  very  much  inferior  Iq 
anthracite  for  the  purposes  indicated.  Ehinks  iingland 
would  have  enough  Anthracite  to  take  care  of  her  end . 

Hegular  coke  would  also  perform  in  the  same  way. 



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Shells  for  smooth  and  choke  bore  rifle  barrels . 

These  shells  servo  to  replace,  if  necessary,  those  shot  from 
smooth  barrels ;  it  goes  without  saying  that  the  ballistic  action  can 
never  bo  equal  to  that  of  the  bullet  shot  from  a  rifle  barrel.  Generally 
in  comes  only  into  consideration  'for  normal  small  shot  distances  from 
30  to  40  meter,  and  used  for  similar  distances  satisfactory  results  will 
be  obtained.  To  incroase  the  certainty  of  aiming,  it  is  advisable  to  put 
a  range-finder  on  double-barrelled  guns  and  to  practice  the  rifle  with  a 
bullet.  The  trying-out  of  the  gun,  together  with  putting  on  the  range 
finder  is  charged  for  very  moderately. 

The  tendency  to  eliminate  buck-shot  on  game  and  replace  it  by 
the  legitimate  bullet  shot,  has  let  lately  to  various  new  forms  of  shot, 
which  from  smooth  rifle  barrels  or  from  choke  boro  rifle  barrels  render 
possible  a  sure  aim  at  distances  up  to  80  meter.  The  experiments  made 
have  proved  that  this  result  can  be  achieved;  hereafter  I  offer  the 
varieties  of  shells  which  give  the  best  rosults. 

riflo  barrel  shell 


of  shell)  system  Bronneke 

Price  II.  14  per  100  -  calibre  16  etc. 

The  shell  consists  of  a  heavy  load  bullet,  2  greased  felt  wads, 
2  pasteboard  wads  and  one  fastening  screw.  The  total  weight  is  equal  to 
that  of  the  usual  3malt-sliot  charge.  The  shell  is  fired  with  damp  fire 
powder,- hunting  powder,  or  smokeless  powder  i.e.  the  same  charge  as  used 
for  small-shot. 

gives  prioes,  descriptions,  etc.  of  all  kinds  of  shells 

Naval  Consulting  Board 
and  Related  Wartime  Research  Papers 
August  1917 


\  ; 

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*,—&—&.■/  <£— ’-~vc  ^"2  JL&riUl-, 

^  ^  C^=J^  6i^-Q 

.august  1,1917 

Hr.  1.  H.  Boerc, 
o/o  :.ord ,  Day  &  lord,' 

49  Wall  Stroot,. 

Den  York,  H.Y.  1 

Doar  Hr •  Boors : 

Iho  Standard  llotal  Liunuf ac  lux  lag  Co . , 
of  Ilowark,  II. J.,  roport  that  tho  cost  of  tho  manu- 
’  fac luring  tools  for  making  tho  Obsorving  fubo  for 
bright  days,  will  bo  about  $100.00 ,  and  tho  cost  of 
tho.  tubes  themselves  will  bo  about  $2.50  each  In 
lots  of  1000.  Choy  are  to  bo  mado  out  of  tin.  X 
think  six  to  each  boat  would  bo  a  help. 

Yours  very  truly. 


■X  4=— is*?, 

|t  OvL&h*-*-w^^c^U^L^ 




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The  Sherwin-Williams  Co. 

JUT  \  % 

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fa  h 

d  *<  *** 

y  iv - 



Acknowledging  your  favor  of  the  33th.  ultimo, 
regret  to  advise  that  we  know  of  no  card  or  hook  oontaining 
a  range  of  colors  Which  would  he  of  any  value  In  connection 
with  the  experimental  work  which  you  are  oarrying  on. 

inhere  is  an  Instrument  known  as  a  Tintometer, 
which  we  understand  is  being  used  successfully  by  silk  and 
other  fabric  dyers,  but  we  have  never  considered  it  as  being  of  any 
<A  Jh?  i  $  value  In  connection  with  paint  manufacture/ 

!  r  We  believe  If  you  will  mifce  Inquiry  with  some  of 

J  "  larger  Bilk  dying  establishments,  yew  maybe  able  to  seoure 
yrmation  concerning  this  apparatus#  We  do  not  come  Into  oonr 
i  with  that  Industry  and  can  give  you  no  referenoe. 

If  you  care  to  send  your  representative  here,  we 
u  -  «jwlll  be  very  glad  to  give  him  an  Idea  of  the  manner  In  whioh  we 

S  *__J-handle  shade  oomparleons  and  the  general  plan  employed  In  work- 

«  »  ,  fan-np  tints.  Our  system  is  very  simple  and  any  one  possessing  a 

If'*  £ '  ^  ^knowledge  of  oolor  values  will  very  quiokly  absorb  the  details. 

The  writer  is  starting  on  his  vacation  within  a 
two  and  in  all  probability  will  not  be  at  the  offioe 
'later  than  noon  on  Friday  of  this  week.  If  you  will  send  your 
representative  here  any  time  tomorrow  or  before  noon  on  Friday, 
he  will  be  very  glad  to  give  him  personal  attention  or  if  the 
delay  will  not  interfere  with  your  work,  he  can  oall  at  your  lab¬ 
oratory  Any  time  subsequent  to  the  27th.  inet. 

Yours  truly, 


<V1  A 1  N  ST- 

orange;,  N.  J? 

67NY  GC  20 

Q  NEWYORK  108PM  AUG  2  197 



■  •i’.'  xiJjUU 




1 29PM 

August  3,1917 

Liout.  ii.  H.  Libboy , 

iiochinory  Division,  . 

’  llavy  yard , 

,  ,Uew  Yo-rk:,  IKY.  , 

Dear  Lieut.  Libbey:  - 

I  havo  seen  your  letter  of  the 
30th  ultimo,  and  in  roplyiiwill  say  that  the  oil  used  # 

■  for  fogging  periscopes  is  composed  of  equal  quantities 
of  "Straw  Oil"  and  the  recidium  aftor  the  distillation 
of  Solvent  liaphtha  in  Benzol  plants.  I  will  send  you 
•a  sample. 

If  you  want  a  quantity  of  this,  you  can  get 
a  barrelior  more  of  straw  oil  from  the  Standard  Oil  Co . 
and  I  can  send  to  one  of  my  Bonsol  >lants  and  got  a 
barrol  of  residium. 

Let  mo  know  . 

Yours  vory  truly. 

/Ci^anO  Oyt4^d  yuj 
zTZ^c^ro  -  /W-  & 'r#~j4  ft 

^w-ts  Tn^fc-  ^  y^°  d&  lyf- 

— * 

/7?  i1.  ~tft  SLe^SM^iti T^  'J*0 

-^finsu-o  -^ud  /o-U*>  'TZZwn.&st  ^rt*^/  w 
6Lac^-u  .o«/  sf  '^isituLy  . 

le+v  dl  ~&u4e<>4j  0^ruc^/  al&o  (v^y> 

m  -etu  ^  j£+rtyy*rr/€**' 


JU6c^^  -Z/i'rrJb.  *& 

/lrt,o<J-ac*y  ?w. 

aZic**y-z*y?  7£e-  O^tUye^d  f~^~ 

0^^  izuu^.  -6^  sx*uf^'  -^y  '*'< 

Or^O'  dC^  zf  7^ 

'  n  -r"/) 

The  Submarine  Defense  Association. 

August  3rd,  1917. 

Confirming  telephone  conver.  ntion  v/itn 
Enirim,  I  give  below  the  formula  s  which  we 
ave ilalile  with  which  to  calculate  the  press 
up  by  the  explosion  of  high  explosives  unde 

r  ^  o.oiy1  ) 

y/»  Energy  per  sa.  inch 
p-  pressure  in  pounds  per  su.  inch 
0=  ',7gt.  Charge  in  pounds 
D=  Distance  in  feot 

•£~.  OM t+4ts 

P«  Pressure  in  tons  per  so  men 
v/=  ",’gt.  explosive  in  pounds 
D=  Distance  in  feet 

Constant  for  explosive  (I.H.S.  ”  3.17 
carrole  (1)  63  lbs.  20  ft.  depth  15  ft.  serious  injury  3574 

h  (2)  64  ”  15  ”  "  I5  "  Dangerous  5401 

t.  (3)  130  "  15  "  "  15  "  Sunk  Target  8662 

Llr  lisr.alt  spates  that  the  target  used  was  built 
in  exact  reproduction  of  the  bottom  of  a  bautle  ship 

August  4,  1917. 

Hon.  Josephus  Daniels, 

Che  Secretary  of  the  Havy, 
Washington,  D.  C. 

My  dear  Mr.  Daniels: 

I  would  very  much  like  to  got 
a  copy  of  the  report  on  pressures  produced  by  high 
explosives  under  water,  which'  I  understand  was  made 
at  Indian  Hoad  about  four  or  five  years,  ago.^ 
fours  vo'jfy  truly. 





.*x^>  4i  uff  V"T 

£j*4  t*9- **■**)  L' 


IX  rt  .«*^c 

^  7T 


August  <1,  101 

1.  H.  Beors,  iisq., 
c/o  lord.  Bay  1  Lord, 
49  tall  atroot, 
lev;  York,  II. Y. 

Dear  Ur.  Boors: 

I  Bhouia  very  nuch-liko  to  know 
if  tho  Allies  aro  in  want  of  lumber,  and  if  any 
is  shipped  abroad .  Also  would  there  bo  much 
objection  to  talcing  in  ouch  ship,  Sja  of  tho  cargo 
apace  for.  shipping  solid  12  by  12  inch  square 
timber,  which  cpuld  bo  sawed  into  lumber  on  tho 
other  side.  Such  timber  would  pay  its  way  and 
earn  for  the  boat  a  aura  which  would  componcato 
for  the  loss  of  5;o  of  freight  space. 

If  tills  can  bo  dono,  itpwonld  holp  out 
enormously  in  solving  ono  of  tho  problems  X  am 
working  on. 

•  It  would  bo  well-  tho  next  time  you  send 
an  Engineer  over  that  ho  be  accompanied  by  ono  of 
your  busi-nocs  mon. 

Yours  vory  truly. 




^  ^  't£> 

;  —  2"^c  ®Hf " 

;  r/  ice* 

i  11  “i  JU«- 

I  -t^cA^  uy-U-s-tJ 

!  Xv^-W 




*~~7  n 

«,3L.  -'■-7 

—f^T"  &-■■*’*** 


jL-2>  4-^f 

|  “Ctc  , 

|  <9'R 




jjf  4  &  <£.(TC  C^t  *5 

lu^rf  tLtci  c^  \.itp  t.v  (cs  «*  <• 



It  C-Cs't 

(-<{.  er..^<t  <tV  ^  L  ^cj 

(Hv-C  fc|>  UjVC-W 

August  4,  1917. 

Rear  Admiral  G.  15.  Bur d. 

United  StateB  Havy  Yard,  ' 

llep  York,  H.Y.  ;  .. 

,Uy  door  Admiral:  .  ;l  ,  ' 

I  liavo  ^received  your  favor  of  the 
Slat  ultimo,  your  Ho.  12-408,  as  well  as  the  two 
Havy  Yard  pusses  for  UesBre.  Wolfe  apd  Xniorim,  and 
wish  to  express  my  thanks  for  your  prompt  attention 
as  well  as  the  thanks  of  Hr.  Edis.on. 

Since  Requesting  the  two  pas sec  for  tho 
gontlemon  ahovo  mentioned ,  Hr.  Edison  has  aokod  me 
to  proouro  similar  pass  for  JJr.  Sold on  G.  Warner, 

Hr.  Warner  was  tho  gontloman  who  came  over  to  tako 
picturos  of  tho  boat  recontly  and  is  also  one  of  Hr. 
EdiBon’c  esporimontors . 

i  am  enclosing. picture  of  him,  as  well  as 
the  other  dotails,  ago,  etc. 

With  kind  regards,  1  remain. 

Yours  very  truly , 

Assistant  .to-  Kr.  Edison. 





Ram _ 

l"-~-  1"“"“°  ICHE0K  1 

SEND  the  following  Telegram,  subject  tcMhe  terras 

Washington,  D.C., 

August  4 . 1917 . 

To_ _  ghomas  A.  Edison. _ 

West  Orange,  11. 

,  J. 

Admiral  Burd  was  telephoned  last 

n  ^  f»Vi  *t*.  t./'  mnl-n  wpi-y  Bffnrt  t„1  -Pnvni  yon  with  prnnril 

boat.  '  He  will  call  you  up  today  on  the  subject  and 
furnish  it  as  soon  as  pocsiblo. — Ploaso  take  it  up— 
with  him. 

Josephus  Dai iols . 

10:58  AIT 

.  V 

VVL^  ‘ 


^cyrjr  Av^— 

Jj  tL^oc. 



August  6,  1917 • 

Gonoral  Henry  1.  Abbot, 
23  Borkoloy  Street, 
Cambridge,  Linas. 

Hill  you  kindly  favor  mo  with  somo  information 
with  regard  to  experiments  conducted  by  yoursolf  on  Suo- 
mnrino  explosives. 

I  am  ihteroatod  in  the  following  points : 

1.  linturo  of  ozploaivae  used.  . 

2  •  Amount  of  explosive  usod . 

3.  Distance  of  explosive  from  forgot. 

4.  Effect  on  target. 

5.  Baturo  of  target. 

G.  Pressure  devolopod  by  tho  explosive . 

Any  information 
appreciated •  , 

r  rofcrencoa  will  be  groatly 

louro  yory  truly, 


S3  <@edb$^ 


.  'JpCetU..  .d'P'j  ;  ... 

_ .  .  (yJ./P  ••  •'  •  •/- 

^fiy-cy  st'Tri'Cb  /3^yy^~ 

£  pfc  ff  <  4 

/'  .PtapL^.  trji?  Jrfrfr-'  .st--:.?#--*. 

5.  ...^  -  ^.4^-  A-  ^ 
. £  cv-  PP^»P  . 

3^  ( /  '2-:?l'{'l‘  tA^->  C'jf  .  - 





is  Park  llow.  New  Yoke 
Aug.  6,  1917. 

Mr.  Thomas  A.  Edison, 
Edison  Laboratory, 
West  Orange,  N.  J. 

Dear  Hr.  Edison: 

I  take  pleasure  in  quoting  herewith  the 
resolution  passed  at  the  meeting  of  the  Board  on  August  4, 
bearing  upon  your  very  interesting  plan  for  reducing  the 
visibility  of  merchant  ships: 

RESOLVED,  that  the  Naval  Consulting  Board  has 
learned  with  great  interest  of  the  suggestions  made  by 
Hr.  Edison  by  which  the  visibility  of  merchant  ships 
may  be  considerably  reduced;  and  that  the  Board 
endorses  the  plans  and  requests  Hr.  Hunt  of  the  Federal 
Committee  on  Ship  Protection  to  submit  the  matter  to 
that  committee  with  the  view  of  securing  a  reduction  in 
war  risk  insurance  when  this  equipment  is  applied. 

As  you  will  see  from  the  wording  of  the  resolution, 
the  Board  expects  some  very  practical  results  to  follow  the 
adoption  of  this  clan,  and  you  may  be  sure  that  we  are  all 
awaiting  these  results  with  deep  interest. 

LOR  D.  DAY  &  LORD 


August  7,  1917. 

Thomas  A.  Edison,  Esq., 

Orange,  IT.  J. 

Dear  Mr.  Edison:- 

Your  letter  of  Saturday,  the  4th,  v;as  received 
yesterday,  hut  I  could  not  reply  to  your  question  about  the 
lumber  until  I  could  discuss  the  natter  with  Mr.  Sparks,  who 
was  absent  yesterday. 

It  is  his  understanding  that  the  Aliies  are  badly  in 
need  of  lumber,  and  that  it  has  not  been  considered  practicable 
to  ship  it  from  this  side  because  cargo  space  was  so  much  ir. 
demand  for  more  valuable  cargo. 

In  your  letter  you  say  that  if  lumber  12  x  12  can  be 
carried,  it  would  help  out  in  solving  one  of  the  problems  on 
which  you  are  working.  That  being  the  case,  this  lumber  may 
be  the  most  valuable  cargo  which  can  be  carried,  and  whenver 
you  think  it  opportune  to  mention  the  plan  you  have  in  mind 
we  will  bring  it  promptly  to  the  attention  of  the  shipping 

Mr.  Bates  has  been  laid  up  for  a  few  days ,  I  presume 
because  he  has  been  working  too  hard,  and  he  will  probably  not 
be  in  the  city  again  before  the  end  of  the  week.  1  hope  we 


can  arrange  as  soon  as  he  returns  to  come  out  and 
if  you  will  find  that  convenient. 

Faithfully  yours, 

_ -/'Tt/w/  y 

lhb/glib  . 

In  reply  refer  to  Ho. 



Office  of  Naval  Operations 

From:  The  Chief  of  Naval  Operations, 

To:  The  Secretary  of  the  Naval  Consulting  Board. 


Cunard  S.S. VALERI A:-  Naval  Consulting  Board, 
re  treatment  of  to  make  invisible,  more  or  less. 

1.  I  have  to  acknowledge  receipt  of  your  letter  of 
August  3,  1917,  requesting  that  the  visibility  of  the 
S.S. VALERIA  be  noted  by  patrol  vessels. 

3.  Suitable  instructions  have  been  issued  to  the 
Commandant  of  the  Third  Naval  District.  I  suggest  that 
you  communicate  to  him  the  date  and  hour  of  the  sailing 
of  the  VALERIA  in  order  that  she  may  be  observed. 

(signed)  Wm.  Pratt 

editorial  department 

Mr.  Thomas  A.  Edison, 

Orange,  N.  J. 

Dear  Mr.  Edison: 

After  a  lengthy  and  ultimately  acrimonious  corresp- 

«r-  «*■».  *••-*«  *'  M  °°"*"1,l"E 

*„«,  i»  *•  -V  A-  -« 

armor  —«•«  “  “* 

been  turned  over  duly  to  the  Naval  Consulting  Board,  c 
tion  of  its  organization,  I  am  now  in  receipt  < 

e  comple- 
a  lettor  from  my 

1B  conclusive.  Mr.  Thayer  has 
s  co-operated 

friend,  Mr.  B.  B.  Thayer,  which  s 

earnestly  endeavored  to  locate  these  papers,  and  he 
with  me  in  every  way,  in  order  to  find  them,  and,  as  you  see,  he 
states  that  he  is  satisfied  that  the  papers  mentioned  never  reached 

the  Navel  Consulting  Board. 

In  view  of  the  fact  that  you  commended  these  plans, 


Thomas  A.  ®dioon, 


Peter  Cooper  Hewitt, 

let  Vice  Chairman. 

William  L.  Saundere, 

2nd  Vice  Chairman 

Thomas  Hobine, 




B.  B.  Thayer 
42  Broadway 
New  York 

August  2nd,  1917 

Courtenay  De  Kalb  Esq., 

420  uarket  St.,  San  Francisco,  Cal. 

My  dear  .Mr  r  Be  Kalb:  '  (.  ,B)  ... 

I  am  in  receipt  of  your  letter  bearing  date 
of  July  27th,  together  with  enclosures,  and  I  feel,  quite  satisfied 
from  the  .investigations  which  I  have  made  in  conjunction  with  Mr. 
Robins  that  tho  papers  which  you  mention  never  reached  the  Naval 
Consulting  Board. 

Very  truly  yours. 

!.  B.  THAYER 

August  8,1917. 

Hr.  Roit. Stirling, 

294  East  143d  Street, 

How  York,  H.Y. 

Hoar  Sir:- 

Yoar  favor  of  the  3a  instant  to  Hr.  Mis  on 
has  boon  received,  ana  ho  wishes  me  to  write  ana  toll’ 
you  to  come  over  and  boo  him  at  your  oarly  convenience. 

As  far  as  I  know ‘now,  Hr.  Mison  will,  he  horo 
for  tho  romaindor  of  the  week,  hut  I  would  suggest'  boforo 
starting  for  Viest  Orango  you  telephone  me  (Orange  907) 
to  find  out  whether  Ur.  Edison  will  ho  here  on  the  day  . 
you  are  ready  to  como. 

Yours  very  truly. 

Assistant-  to  Hr.  Edison. 

32441/23  (Ql)-O 




Subject:  Under  Viator  _rossuros. 

P.oforencc  :  (a)  Your  letter  of  August  4th. 

Eildtecuro  :  (A)  Copy  of  Haval  Proving  Groun cl  letter  2794 

/  July  27th,  19 15. (Bureau  Pile  2o014/ 

209 ) . 


In  reply  to  your  letter,  reference  (a),  v-hich  Has 
boen  referred'  to  tliiB  Bureau  by  the  Secretary  of  the  Havy , 
there  is  enclosed  her ewith  a  copy  of  tee  Haval  --roving 
Ground  report  summarising  tee  results  of  experiments  u> 
determine  undor-v.'nter  pressures  at  distances  -rom  the  ex¬ 
plosive  charge. 

It  will  be  noted  that  the  accepted  formula  for  all 
distances  from  the  charge  may  be  taken  as 

wherein  i  is  the  pressure ‘in  tons;  Vf  the  weight  of  tho  hiji 
explosive  in  pounds  and  D  the  distance  in  foot  xrom  .the  cen¬ 
ter  of  gravity  of  tho  mass  of  the  high  explosive.  L  is  a 
constant  dependent  upon  tho  high  explosive  used.  If  ca^ 

211®,  it  has  boon  determined  as  3.17. 

It  is  requested  that  the  contents  of  the  enclosure 
be  eonsiderod  confidential  and  that  after  such  . 

as  m£y  be  desired  have  been  made,  tho  enclosure  bo  returned 
to  the  Bureau  for  its  records. 


cX  (ju  /ClZa. 

Hr.  fhomas  A.  Edison, 

Acting  Chief  of  Buxeai 


JtoML,  CoorsuoiNG  Board 



1:1  Park  Row.  New  York 
Aug.  8,  1917. 

To  -the  Llenbers  of  the  liaval  Consulting  Board, 

Dear  Sirs: 

Please  he  advised  that  the  next  meeting  of  the 
Board  will  he. held  at  the  Carnegie  Institution,  Washington, 
on  Saturday,  August  18,  1917. 

In  accordance  with  a  recent  resolution,  the  informal 
meeting  begins  at  nine  o'clock  and  the  formal  meeting  at  ten. 

Very  truly  yours, 

Thomas  Robins 

By  C'fl* 

IT:  S' 

“V  9-  'VI- 






&GCX~/-  f  OdZ/gt 

**/.  ts^ * 

**  *f  *w 


J-OtrUL  yius/ 


o^yftSc. to 

~/*7  -  ^ ■— **, 

w ^  “7  ^‘*~^  c^. 


»  tr<x<Ui 

—  ^c 

“^e  ««3 


<«  daw**.  /tWyr 

c*l*Jy  y*ovt4  j  . 

“  Compaiiiy 

Thos.  A.  Edison  Co., 
Orange , 

ATTENTION:  Mr.  Thos.  Edisc 

Following  visit  I  made  this  morning  before  you 
arrived  I  left  with  your  Mr.  Altengarten,  a  sample  piece  for 
your  inspeotion  and  criticism.  He  called  me  up  since  my 
visit  and  stated  it  nuite  appealed  to  you. 

It  doeB  not  quite  suit  me.  I  think  that  we 
can  make  a  hatter  proposition  than  this  sample,  this  being 
the  first  one.  It  is  a  trifle  too  bulky  and  I  should  judge 
should  be  made  a  little  different.  However,  that  can  be 
talked  over  at  your  convenience. 

I  shofcld  judge  that  we  could  turn  this  out  for 
you  with  sewing  done  this  way  or  similar  to  this  for  $1.75  to 
§2.00  each  depending  on  the  quantity  and  metal  conditions. 
Tool  charge  would  remain  the  same  as  per  our  letter  of  July 
31st.  I  trust  that  this  will  be  interesting  to  you  and  we 
will  be  very  glad  to  hear  from  you  at  your  convenience  if  we 
can  be  of  further  service  to  you  in  this  matter. 

If  you  wish  to  put  me  in  touch  with  any  of  the 
prospeots  who  might  be  able  to  purchase  them  I  would  be  very 
glad  to  interview  them  to  help  the  matter  along. 

With  kindest  regards,  remain 

Yours  very  respectfully, 



•ymbol  appearing  after  the  cheek.  | 






wUeUi chu^teHs lnd|ealed byUje  | 

93NY  GC  1,0 

bRANGE,  N.  J. 

1.0  ' 

SB  SAG  HARBOR  NY  115  PM  AUG  10  1917 




SB  SAG  HARBOR  NY  AUG  10  1917  130PM 






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v  U  o 

32441/23- (Ql)  NAVY  DEPARTMENT 




Subject:  Under-water  pressure. 

Reference:  (a)  Your  letter  of  August  4,  1917. 

(b)  Bu.  Ora.  let..  32441/22  of  August  8th. 

(c)  Your  telegram  of  August  9th. 


In  reply  to  reference  (c)  the  Bureau  considers  that  the 
data  supplied  in  reference  (b)  is  adequate  for  the  calcula¬ 
tions  of  the  pressure  at  the  various  distances,  of  mines 
of  any  description,  provided  that  the  weight  of  explosive 
and  the  nature  of  the  explosive  is  known. 

It  may  be  assumed  that  the  German  mines  contain  500 
sounds  of  TUT  (cast)  and  that  a  torpedo  contains  400  pounds 
of  cast  TUT. 

With  this  information  and  v/ith  the  formula  cited  in 
reference  (b)  it  should  be  practicable  to  obtain  pressures 
at  such  distances  as  you  may  desire. 


st&l,  a 

Acting  Chief  of  Bureau. 

Mr.  Thomas  A.  Edison,  . 
Orange,  H.  J. 

Navatl  Coisuitmg  Board 


August  13,  1917. 

Mr.  Thomas  A.  Edison, 

Llewellyn  Park,  West  Orange,  N.  J. 

Dear  Edison: 

Hutchison  telle  me  that  you  would  like  to  look 
over  some  of  my  correspondence  with  the  Department  on 
possibly  operation  against  submarines,  so  I  am  enclosing 
same  herewith. 

If  you  get  the  time  when  you  are  sleepy,  I 
would  be  glad  to  know  what  you  think  about  it.  After  you 
are  through  have  Hutchison  return  the  papers  to  me. 

Sincerely  vpurs. 


'  fc'ip.  "fc-fuwU  1  U>  *  W  ^ 

-  c£<> 

«— s*  *-»v 

August  15,1917. 

Luc iuc  H’. .  Boors  ,  Esq. , 
c/o  Lora,  Bay  &  Lora, 
49  7/all  Stroot, 

Hew  York,  11  .Y. 

My  dear  Hr.  Boors: 

You  will  Bo  glad  t0  know  t5iat  1 
havo  just  received  information  from  my  men  at  the 
Proving  Grounds  near  Sag  Hart or,  1.1.  of  the  E.  «. 

Bliss  Company, .where  torpedoes  are  tooted,  that  when 
our  boat  wee  anchored  wg  hoard  tho  torpodo  by  undor- 
wator  dotoctor  for  a  diotanco  of  five  miles,  without 
using  our  most  sonBitivo  apparatus.’  It  is  probables 
that  in  actual  nraetico,  notwithstanding  the  noiso 
of  the  boat,  I  shall  bo  able  to  hoar  tho  torpodo 
almost  immediately  after  it  is  firod  within  a  distance 
of  two  niiloc .  Kith  a  dovico  wo  arc  trying  out 
today,  and  further  experiments ,  X  hope  to  bo  able 
to  swing  tho  boat  to  90  dogrooc  rapidly  and  oscape  . 

any  torpodo  that  will  bo, fired  without  .oven  knowing.  VI"*- 
that  any  Submarine  is  in  tho  vicinity.  fho  only 
thing  that  worries  mo  is  that  I  am  afraid  I  shall 
have  to  put  ouch  merchant  chip  in  dry  dock  for  one 
day  to  put  in.  detoctor,  but  I  shall  try  hard  to  avoid 
this  oxpenso  and  dolay.'  ’ 

I  have  forwarded  to  tho  Soorotary  of  tho 
liavy  todny,  blue  print  of  tho'  Oleum  smoko  shell  for 
•  approval . 

•  X  am  arranging  today  with  the  Brooklyn  Ilavy 

Yard  to  havo  a  throo-ineh  Iluvy  gun  bored  out  to  tost 
tho  undorwatcr  traversing  pro jeetilo  to  destroy^  tho 
Submarine  water  pratoction  and  give  tho  merchantmen 
gunners  ant  oven  chance. 

Yours  very  truly. 


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CC.CL,  y  t 

August  16,1917. 

Ur.  Frank  3.  3praguo, 

166  Broadway, 

How  York,  li.Y. 

Uy  dear  3 praguc : 

.1  havo  rocolvod  your  favor  of 
the  13th  inotant,  onclosing  eomo  of  your  correE- 
pondonco  with  the  Ilavy  Dopartmont,  and  which  I 
return  herewith. 

I  think  we  nood  all  tho  Dootroyora  we 
can  pot.  She  "Bijou  Sorpedo"  is  a  move  in  tho 
right  direction. 

Yours  very  truly, 

jincloBuros . 

RECEIVED  AT  sag  Harbor, W.Y.  8/15/17.  11.55AM. 

8  CS  S4 

Orange  NJ  1034  AM  15 
A  M  Kennedy, 

Or  E  W  Bliss  Co, 

Started  making  a  new  two  thousand  wire  transmitter  will  have 
ready  about  time  damaged  one  arrives  getting  new  casting  for 
belt  transmitter 

VI  H  Meadoworoft. 

August  10,1917 

Luc lue  JI.  Boors,  Esq., 
o/o  Lord,  Day  &  Lord, 

40  Wall  Stroot, 

Iiew  York,  li.Y. 

Uy  doar  Hi-.  3oors : 

You  will  Lo  glad  to  learn  of  on 

COU3BO  ^  ;^  ,wcaio  l:iv  r,  v.ith  a  small  launch, 


•Foot  bv  uso  of  the  regular  rudder ■,  but  by  using 
bout^a^righ^anglo^whilo^ho^advan^od^only^BO  foot 

,  This  will  holp  out  imraoneoly • 

Yours  very  truly. 





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August  16,  1917. 

Thomas  A.  Edison,  Esq., 

Orange,  New  Jersey. 

Dear  Mr.  Edison: 

Yesterday  at  Washington  on 
going  over  with  Admiral  Benson  various  plans 
which  you  had  recommended,  I  found  that  I  heed 
another  set  of  copieB  of  your  photographs  of  the 
floating  tub  or  buoy  which  is  intended  to  give 
off  smoke  some  time  after  the  Bteamer  has  set 
it  adrift.  Can  you  not  have  sent  to  me  one  or 
more  photographs  of  this  devise ,  together  with 
any  written  instructions  as  to  itB  preparation 
and  use?  I  think  the  Navy  will  now  act  quickly 

>.-<  a^r 

in  this  matter. 

^hithful ly  yours, 



Ur.  Adison: 

lir.  Beers  is  sending  the  following  letter  to 
you  today  by  nail,' and  thought  to  save  time  he  would  . give 
it  to  me  over  the  'phone.  He  is  very  anxious  to  get  .'the 
photographs  as  quickly  as  he  can.  Ills  letter  is  as  follows: 

"Yesterday  at  Washington  on  going' over  with 
Admiral  Benson  various  plans. which  you  had  recommended, 

I  found  that  X  need  another  set  Of  copies  of  your  photo¬ 
graphs  of  the  floating  tub  or  buoy  which  is  intended  to 
give  off  smoke  sometime  after  a  stoanje'r  had  set  it  adrift. 

Can  you  not  have  sent  to  me  one  or  more  photographs  of  this 
device  together  with  any'  written  instruction  as  to  its 
preparation  and  use.  I  think  the  ilavy  will  now  act 
quickly  in  this  matter.  Also  can't  you  send  me  another 
set  of  photographs  of  your  under-water  traversing  projectile". 

t^Cr7>-o  ^ 

Utp - ^^*-*1'  .  • 

(W.  H 


Jc  «-*  r^x^Jr  %  SiJzZ^)  y 

\^h-^X>  Am  o-*^ 


Cf,  \JtsK,  CA<^~*-1  ma«*— nv  - 


•august  1C ,  1017  . 

Lucius  u.  Boers,  Esq.-, 
c/o  Lord,  Day  Is  .word , 

49  ‘wall  Stroot, 
liow  York,  II.  Y. 

j'y  door  llr.  Boors: 

Your  telephone  message  has  boon 
shown  to  no,  and  in  roply  i  wish  to  say  that  tlio 
photograph  .of  the  smoko  producor  only  represented 
one  of  the  many  smoke  producers  that  I  hare  gotten 
up.  Sinco  it  was  made,  I  have  perfected  tho  pro- 
duoor,  and  a  commercial  model  is  now  being  made 
and  1  eicpoct  to  havo  it  finished  Monday .  Yhis 

will  then  be  tried  from  my  boat  at  Sag  harbor,  and 
I  will  sond  you  photographs  of  tho  burner  and  hot. 
it  appears  at  distancos  on  tho  sea.  If  it  is  all 
right,  I  will  sond  you  blue  prints  so  any  nurabor  can 
bo  quickly  manufactured  in  any  small  boiler  shop  or 
made  by  acotylcno  wold lug, which  is  a  preferable  method. 

As  roquostofl ,  I  am  sending  you  another  sot 
of  tho  under-pater  traversing  projectile. 

Yours  very  -truly. 


•  It—-. 

f  ; 

CU(y  ib.i'ir/ 

Illy  (dnn\ 

h  Til  L  J * -  A.  -  >i  if  / //  L l  i; /  //< <  • 

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/' '  r  >  ■  j  c  |  /  / i  v  l  *s'  i  i  H  t  /to  i  (■  /•' f  v.- 

Cif  f  Chili 

a  t k*  j /<•  -  •>'/ 0  — 

s!uv.a-f  ^Lit'  -‘y 

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2-  D/n  .  "fun-1  ./.i 

J.  /V.’  Parrot,  IIP-  U 

ct  OS  it  j  •  .i„'.  i/is 

. £'*••>  '  0)  / 

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1 09 NY  GC  24  ^OVT^  ^  G  N  .  J,  _ - 

WASHINGTON  DC  428  PM  AUG  16  1917  ^ 



MU&>UON]£  u<j 

BY Jk*L_  AJgrg 


August  16th,  1917. 

i-  + 

Mr.  Thomas  A.  Edison, 
East  Orange,  H.  J. 

My  dear  Mr.  Edison:- 

This  will  introduce  to  you  Mr.  William  Greene 
of  the  Bureau  of  Mines,  who  is  working  with  the  Bureau  of 
Ordnance  in  connection  with  smoke  producers. 

I  thought  that  it  would  he  a  good  idea  for 
Mr.  Greene  to  have  a  talk  with  you  this  afternoon  so  that 
you  and  he  would  both  know  what  work  was  being  done  and 
had  been  done  so  that  there  would  be  no  duplication. 

Thanking  ,  you;-' X  am 

Very  respectfully. 

Lieutenant,  U.S.H. 




August  17,  1917.  ' 

Ur,'  Edison  has  been  oallod  to  'hashing t on ,  but 
wishes  you  to  prooeed  as  followb: 

1.  Lio  at  the  limogrant  Pier,  just  north  of  tho  B. 

L.  &  ",  Forry,  Monday  morning,  August  20th,  at  0:0)  A. a. 

2,  Lie  thoro  until  Mr.  Edison's  mon  oomo  alongside 
in  a  truck  loaded  with  instruments  and  apparatus,  which  you 
will  take  aboard. 

g.  Inasmuoh  ns  you  will  allowed  to  lio  at 
this  dock  for  a  very  long  period  at  a  time,  when  you  get  the 
•machinery,  oto.  aboard,  come  to  anchor  in  midstream,  as  near 
the  Hoboken  Ferry  as  iS  consistent  with  harbor  rules  and 

4.  If  tho  men  have  oooaaion  to  go  ashore  during  tho 
day,  pormit  them  to  do  so.  placing  the  launoh  at  their  dis¬ 

6.  Have  the  launoh  at  the  Erne grant  Pier  at  0:00 
A.M.,  Tuesday,  the  Elat  instant  and  thoro  await  Mr.  Edison. 

0.  ’.’men  you  havo  solooted  on  anohorago.  Hr.  Ohosler 

.  that  he  may  wig-wag  to  you  to  send  a  boat  ashoro. 

7.  Have  your  Officer  of  the 

dook  that  Mr.  Ohosler  and  you  decide  apon  as  Hr.  oh  taler 

dock  for  men  ashore  to  signal  to  you  1r"0°tg  oomo  aboard  after 
will  instruct  the  ^afto  what  dock  to  oomgjo  and  how 

^o°  signal  wlTh  a°  pooket  lum’ater chief ,  swinging  in  arW-^eal  piano 
from1 right  to  left,  left  to  right  continuously  until  answered 
from  the  deck  of  tho  SACHEM. 

8.  Mr.  Ohoslor  is  in  ohargo  of  the  Laboratory  mon 
aboard  tho  SACHEMdurihg  Mr., /.din  on  a  nbsonuo. 

9;  I  am  nloo  ottlletl  to  V/aohinBton  nncl'will  not  bo 

bade  until  next  wflolc. 

Vary  trd,  y ^ o iirg.^  y/  ... 

■  * 

.rajoiiiavaaao \)vis.;Vi-uo un.  rails  on. 

Gapt.  J.  il.  Patton, 

Com.  U:;3  3ACEG11,  ' 

loboa  Betain,  . 

;rt.  33rd  Ctroot.  Brooklyn,  II. i- 

CO;  Ur.  Kdinon  and  Ur.  ^healer. 



— •  ' 

"Xvi  ... 

Jh+LOAA'-  rjj-  tU^ 

Q^cCsC-p-tstSU-?^  .  A 

(UtA^: /(rw  i  , 

h^O^C  MrtAJl  ‘V^c- 
'  '  * 

S'hJs'i ct \  l:  Q-t&it~  .  ^'tT^&t'V  '/fc~  Q  fi^r'rJL 

238  -VI AIN  ST. 

ORANGE,  N.  J2 


T',7  WASH  I  r,GT0M  DC  AUG  17  1517  31 6PM 


August  17th,  1317 

From!  Tho  Commandant,  Third  Naval  District 

To:  Commanding  Officer,  OSS  SACHEM  (S  P  193) 

Subjeot:  Orders 

1.  You  will  report  with  the  s/Y  SACHEM 
at  8:00  A.  M.  Monday  30th  August  1917  at  the  Immi¬ 
grants'  Pier,  North  of  DL&W  Railroad  Ferry,  Hoboken, 

N.  J.  for  dutiea  under  the  orders  of  Mr.  Thomas  A. 
Edison,  to  make  experiments  for  submarine  detection. 

3.  This  vessel  is  to  be  manned  and  officered 
and  to  be  outfitted  in  aocordanoe  with  instructions 
to  be  given  by  Mr.  Edison. 

3.  Acknowledge  reoeipt  of  this  letter. 

Copy  to: 

Ohiof  of  Naval  Operations 
Mr.  Thomas  A.  Edison, 

West  Orange,  N.  J. 


August  17th,  1917, 

W.  H.  Meadowcroft ,  Esq., 

Edison  laboratory. 

Orange,  Hew  Jersey. 

My  dear  Mr.  Meadowcroft 

I  enclose  herewith  for  your  information  and 
files  pamphlet  reprint  copy  of  bibliography  of  the  liter¬ 
ature  of  Submarines,  etc.  in  the  preparation  of  which  I 
had  the  honor  to  assist.  X  trust  you  will  find  this 
interesting  and  if  you  think  that  Mr.  Edison  would  care  to 
have  an  additional  copy,  I  will  be  pleased  to  furnish  one. 

With  very  warmest  regards  and  with  the  hope 
that  you  will  find  time  to  drop  in  and  see  me  one  of  these 
days,  I  am 

Sincerely  yours 


The  Edison  Company. 

Orange,  Hew  Jersey. 

Gentlemen:-  Attention  Mr.  Thomas  A.  Edison. 

I  have  not  heard  from  yon  in  responoe  to  my 
letter  pertaining  to  the  submarine  periscope  that  we 
figured  on  with  you.  Is  there  anything  that  we  can  do 
for  you  on  this  matter?  Either  in  the  way  of  making  the 
goods  or  cooperating  with  your  Hew  York  end. 

I  would  be  very  glad  to  hear  from  you  on  this 

Yours  very  truly, 


irkr  r 


t+etnx-  dt 

1  ^  ^gT 

August  10,1917 

Ur.  if.  A.  Lawrence,  Pros.,  - 

Standard  Metal  Manufacturing  Go . . 

Chestnut  and  Alalvcrn  Streets, 

Ilewark,  ii.J. 

Dear  Ur.  Lav7ronco : 

I  have  received  your  favor 
of  tho  17th  instunt,  and  will  say  that  five  of  . 
tho  devices  wore  sent  on  a  Cunard  steamer  Aloud  ay 
last,  to  bo  given  a.  practical  tost  and  it  will 
no  doubt  bo  some  tine  before  I  hear  of  the  ro- 

lours  vory  truly, 

RECEIVED  AT  Q  (yj  <3  El,  N  -  J 1 

l/'C  WASHINGTON  D  C  1050  A"  AUG  18-17 




lir .  John  A.  hrashour, 

It,  connocti  >n  with  certain  experiments 
of  ;ir .  JJtliEon's,  surface  mirrors  are  employed ,  thi 
largest  being  ab  .at  6  inches  by  7  inches.  *hoeo 
mirrors  aro  exposed  to  tho  action  of  damp  sea  r 

iVo  havo  boon  us: 
protected  tilth  a  very  thii 
should  like  to  know  if  a  : 

3i  Ivor  of.  glass  mirror 
it  of  pyroxylin,  but 
eor:'.anont  reflector 

epoculun  me' 
protecting  < 

,  Or  perhaps  ; 
,  than  p.  roxylii 

i‘4iy  information  you  cun  pivo 
subject  will  ho  greatly  appreciated. 

Auruct  21,1917. 

William  ill  lanmon,  Kan. , 
165  Broadway, 

How  York,  II. Y. 

iiy  doar  iir  -  Lunman : 

It  rao  cortf. inly  voiy  hind  of 
you  to  send  rao  a  copy  of  tho  ;  amphlet  containing 
the  bibliography  of. tho  literature  of  Subraarinoe, 
otc.  It  is  a  vory  useful  document  for  us  to  have 
here,  and  I  shall  cortainly  be  vory  glad  to  have 
you  sond  me  another' copy,  as  I  have  already  given 
iir.  iidison  tho  one  you  sent  rao.  I  think  ho  will 
be  ablo  to  inalco  good  uso  of  it. 

Allow  mo  to  congratulate  you  on  your  part. 
It  is  u  vory  fino  piece  of  work.  I  think  it  is 
splendid,  and  undoubtedly  will  bo  of  vory  groat  use 
to  tho  World,  but  for  pit  Jr,  oake  koop  it  out  of  Ger¬ 
many  . 

I  oxtond  to  you  my  kindost  regards ,  and 
shall  certainly  try  and  stop  in  come  day  if  I  can 
find  time  to  got  to  tho  City. 

Yours  sinpcrcly. 

J|-^  ^  yc£.*C~4>(L  hds> 

e4-(W  ?4^^  lc4p^fc  (uz*4 

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muuc^U.  jU-cdST-UJZ  ^t 

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-t?  YU-w  M-4  *tc-<ec^‘ 

tSo»e^fy'^^*^C.O-*v.c  ^t~c— 

U&L  JU> 

ypt^C f  ^c  C£'  ‘ 

August  21,1017 

Ur.  L.  H.  Boora, 
c/o  lord,, Bay  &  lord, 
49  V/all  Street, 

Bow  York,  11. Y. 

Door  llr.  Boora:  - 

I  enclose  photos  of  the  smoke  producer 
which  1  am  taking  down  to  the  bob  to  he  operated  from 
Submarine  Chaser  192,  which  leavos  today. 

A  more'  complete  manufactured  model  is  bo  in;’ 
made  by  an  outside  concern,  which  will  bo  finished  Shura-' 

a  a  the  Knglish  are  short  of  oil,  I  an  rauking 
another  typo  to  burn  tar,  of  which  they  have  large  quanti¬ 
ties  in  useless  at  procont. 

Xoaro  very  truly. 





r  l  T 


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/*  r AA  ryir  /  V  /lv 

"  i/  A  (^August  aistfAioivy?'  jfV 

/A  /  #  A./  A7 

Thomas  A.  EdiBon,  EBq. , 

Orange,  New  Jersey. 

Dear  Mr,  Edison:- 

Your  letter  with  reference  to  the  "kite  rud&^xjy  >H  A 
was  received  and  the  information  you  give  about  that  devis 
is  very  interesting,  for  one  of  the  serious  problems  has  beefy  bring  the  ship  around  quickly  enough.  From  what  you  e,^j/  \iu  ^ 

I  Judge  that  this  devise  is  available  for  vessels  of  any  sizej^ 
and  as  soon  as  you  are  ready  to  do 
have  further  particulars. 

Faithfully  yours, 

...  -/r  -  ' 

/  A  /  fry  $ 

/Ay  • 

f  I' 

for  vessels  of  any  size  y  . 

I  hope  you  will  let  u 


LOR  D.  DAY  8c  LORD 



August  ZlBt,  1917, 

Thomas  A.  Edison,  Esq,, 

Orange,  Hew  Jersey, 
jjear  Mr.  Edisonj- 

Yours  of  the  16th  was  duly  received,  enclos¬ 
ing  photographs  of  the  under-water  traversing  projectile. 

Whenever  the  descriptions  and  blue  prints  for 
your  smoke  producers  ore  ready  1  hope  you  will  let  us  have  them. 

I  have  taken  the  matter  up  with  the  Navy  Department  so  that  they 
could  carry  on  whatever  communications  with  the  British  Admiralty 
are  necessary,  for  unless  the  use  of  these  devices  is  understood 
in  advance  ty  our  allies  they  will  perplex  both  friend  and  foe. 

Faithfully  yours, 



August  £2,1917 • 

Hr.  Courtonuy  Do  Hnlb, 

420  Market  Street, 

Sari  Francisco,  Cal. 

Dear  Mr.  Be  Ealb: 

Your  favor  of  tjie  7th  instant  to  I  Yr.  lid  is  on 
was  received,  .but  he  is  away  on  Government  experiments,  and 
I  have  no  definite  information  as  to  when  he  will  return. 

It  is  very  unfortunate  that  vie  have  boon  unable  to 
locate  your  papers.  Of  course,  you  can  quite  noli  undoretand 
that  Mr.  Edison  cannot  spare  tlie  timo  to  personally  attond  to 
any  dotaila  of  this  kind.  I  havo  made  several  energetic 
searches  for  thorn,  hut  they  are  not  hero. 

During  the  course  of- my.  investigation,  and  in  look¬ 
ing  over  our  coi'rospondanco ,  the  probable  solution  of  the 
problom  flashed  across  my  mind*  For  somo  little  timo  before 
the  organization  of  the  Ilaval  Consulting;  Board,  a  number  of 
ideas,  and  suggestions  had  boon  sent  to  Mr.  Edison.  While  the 
preliminaries  of  organization  wero  being  talked  ovor",  all  of 
these  ideas  and  suggestions  noro  gathered  together  and  turned 
ovor  to  Dr.  li.  It.  Hutchison  of  our  laboratory,  to  bo  forwarded 
to  Washing ton .in  order  to  avoid  delay  in  thoir  consideration. 

I  may  say  parenthetiojljly  that  Dr.  Hutchison  also  became  a 
iiombor  Of  the  Ilaval  Oohsulting  Board  when  it  via's  organised, 
ills  Secrotary  tells  mo  that  ho  forwarded  a  large  batch  of  those 
ideas  and  suggestions  direct  to  Secretary  Daniels  at  Washington, 
some  nooks  boforc  the  II aval  Consulting  Board  was  formally  organ¬ 
ized.  Unfortunntoly,  no  list  v,aa  kept,  as  we  were  so  fourfully 
rushed  at  the  timo. 

'  1  fool  quite  cortain  that  your  pupors  wore  sent  down 

with  the  above  mentioned  batch,  and  therefore  they  must  have 
recoivod  consideration  at  Washington. 

Yours  vory  truly. 

Assistant  to  Mr.  Edison. 




WASHINGTON.  D.  C.  August  22, 

Dear  Sir: 

The  Havy  Yard,  Hew  York,  in  April,  1917,  in- 
formed  the  Bureau  that  it  had-  at  your  request  inspected 
your  elementary  "magnetic"  telephone  system,  and  sug¬ 
gested  that  the  Western  Electric  Company  ^6  C«nicated 
with  in  regard  to  same,  as  tests  conducted  in  connection 
therewith  were  made  in  cooperation  with  that  Company. 

The  Western  Electric  Company  have  recently  com¬ 
pleted  tests  of  your  proposed  system  and  reports  the  fol¬ 
lowing  conclusions:  p 

"The  tests  that  we  have  made  indicate  that 
in  using  such  magnetic  transmitters  a  three 
stage  vacuum  tube  amplifier  would  be  required 
for  eaoh  group  of  stations  that  are  to  be  oper 
ated  independently.  The  magnetic 

to  have  no  advantages  over  one  using  carbon  trans 
mitters  from  a  quality  standpoint.  While  the 
quality  ana  intelligibility  of  the system 
was  inferior  to  that  of  the  recently  developed 

certain  changes  in  the  design  of  the  magnetic  trans¬ 
mitter  Such  ohanges  would  entail  some  sacrifice 
the  efficiency  of  the  instruments,  but  not  more 

than^oould  be  compensated  for  by  working  the  ampli¬ 
fier  at  increased  gain. 

"Referring  to  Paragraph  2  of  your  ietter  of 
A--J1  we  had  th.©  objections  cited  against 

£*\WS  . 

0,.  ., 

'W“T^“  ^  jufr+jt 

t5"  cr^^w— -I  XeJ&^-y  ’  C 

^":iu  i^-<f ^  r^r 

,  ■  __  ,  ‘  Q<  .  .  J  L  ,C>  .V  >  L^^w/  'i£ML 



ttt  ls*6~*^\  *■  J J> 

'■  tssrr  1^-*-  ■*••  *  ^  “■ttv 
jtf  r  ~7oJ?' 


oheok  on  our  conclusions,  but  bo  far  as  our 
esrerience  goes,  I  am  unable  to  .Bee  that  the 
magnetic  system  wouia  have  any  sub stant ial  ad¬ 
vantage  over  the  system  with  which  we  have  com¬ 
pared  it  and  it  would  have  certain  disadvantages. 

The’  use  of  the  magnetic  system  would  require  a 
more  complicated  switchboard  with  provisions  for 
amplifiers  and  also  the  use  for  each  circuit  of  four 
line  wires  instead  of  two  and  of  four-conduotor 
cords,  plugs  and  jacks. 

"In  view  of  our  findings  as  above  outlined, 

I  believe  that  the  magnetic  system  shows  very 
little  promise  of  practical  utility.  I  shall  be 
plad  to  do  anything  further  with  the  apparatus 
that  you  may  wish  to  suggest,  however,  and  I  am 
keeping  it  set  up  for  the  present  m  order  that 
an  officer  from  the  Bureau  may  make  an  inspection 
and  further  tests  if  you  desire  it.  I  should  be 
glad  to  have  him  come  over  for  that  purpose  at  any 
time."  . 

Very  respectfully, 

Assistant  to  Bureau. 

Mr.  Shoinas  A.  Edison, 
Orange , 

Hew  Jersey. 

- 1  nations  should  be  addressed  to  "The  Cannon  Section,  Can  Division,  Office  of  the  Chief  of  Ordnance,  U.  S.  A, 
1330  F  Street  NW.,  Washington,  D.  C.” 



August  33,  1917 

Subject:  3-inch  Field  Gun,  smooth  bore, 

for  firing  projectiles  that  will 
not  ricochet. _ 

instant,  (353.41/14)  in  reference  to  3n  smooth  bore 
field  gun,  I  am  directed  by  the  Chief  of  Ordnance 
to  inform  you  that  the  only  way  in  which  a  suitable 
smooth  bore  gun  provided  would  be  to  ream  out 
an  old  rifled  gun.  This  will  necessarily  increase 
the  bore  and  information  is  requested  as  to  the  exact 
diameter  desired  by  you.  The  carriage  to  be  furnished 
[With  this  gun  for  your  use  will  be  designed  to 
ivith  stand  the  pressure  produced  by  the  standard  3" 
irfield  gun  ammunition,  and  information  from  you, 
^therefore,  as  to  the  velocity  at  which  you  wish  to 
Kfire  your  projectil^vwill  be  necessary  before  it 
lean  be  determined  if  our  standard  field  carriage 
will  withstand  the  pressures  to  which  your  experiments 
will  subject  it. 

3.  The  furnishing  to  you  of  a  field  gun 
suited  to  your  experiments  will  be  given  special 
attention  and  if  necessary  someone  will  be  detailed 
to  the  particular  work  of  getting  it  ready  for  your 




or  the  tooted  states 


uiParic  Row.  NhwYohk 
Aug.  22,  1817. 

To  the  Members  of  the  Naval  Consulting  Board, 

Dear  Sirs: 

It  has  Been  suggested  that  as  Sept.  1,  the  date  of 
the  next  meeting,  will  he  the  Saturday  before  Labor  Day  it 
night  be  better  to  postpone  the  neeting  until  Saturday,  Sept. 8. 

Will  you  kindly  express  your  opinion  on  this  subject 
bv  return  nail  hereon  in  order  that  the  views  of  the  Henbers  nay 
be  learned  and  definite  arrangements  made  without  delay. 

Very  truly  yours, 


Secretary.  ' 

X  ^  do ^  favor  postponing  the  next  meeting  until  Sept,  8. 

RECEIVED  AT  438  BL00MFl£5>*6R/&0l*<lKIBi  ED*  N.  Jt 
93NY  H  9 

8 AG  HARBOR  NY  245  PM  AUG  23-17 





AHTatiraMKUUOAl.  A^.'ni)  a»IIYSWCAH-  INM'TUinitHKTH 


August  2  S, 



Mr.  Thomas  A.  iicllson. 

Orange,  N.  J. 

My  clear  Mr.  33 i son: - 

In  reply  to  letter  of  the  22nd,  we  ’mow  of  no 
covering  for  silvered  surfaces  to  protect  the  sar.-.e  except 
i  thin  co-tins  of  oyroxvlin,  and  oven  that  detracts  from 
the  accuracy  of  the  surface. 

Draper  gilded  silver  films  in  order  to  protect 
them  from  tarnishing  hy  the  following  process :- 

"Take  three  grains  of  hyposulphite 
of  soda  and  dissolve  it  in  an  ounce  of 
water.  Add  to  it  slowly  a  solution  in 
water  of  one  grain  chloride  of  gold.  A 
lemon  yellow  liquid  results  which  event¬ 
ually  becomes  clear.  Immerso  the  sil¬ 
vered  glass  in  this  solution  for  twenty- 
four  hours.  An  exchange  will  take  place 
and  the  film  tic  comes  yellowish.  I  have 
a  niece  of  silvered  glass  prepared  in 
this  way,  which  remains  unhurt  in  a  hox 
while  other  nioces  of  plain  silvered 
glass  have  becomo  -worthless  from  exposure 
to  coal  gas." 

Unfortunately,  this  does  not  have  reference  to 
preventing  moisture,  which  I  fear  it  will  not  do. 

How  as  to  spoculnm  metal,  while  moisture  will 
settlo  upon  its  polished  surface,  it  is  readily  wiped  off 
with,  say,  absorbent  cotton. 

The  polishing  of  soeculum  motal  was  almost  a 
lost  art  until  our  Mr.  McDowell  tool:  it  up  when  we  com¬ 
menced  to  mako  the  plates  for  the  Rowland  diffraction 

v7e  have  unfortunately,  no  polished  plates  on 
hand  nor  do  we  see  our  way  in  the  maze  Of  our  work  ana 
the  demands  of  the  government,  to  grind,  polish  and  cor¬ 
rect  any  surfaces  at  the  present  time,  although  wo. have 
castings  of  speculum  metal  about  the  size  you  require. 

You  '"ill  al  so  note  that  v/hilo  silver  on  glass 
mirrors,  v/hen  up  to  standard  ,Polisk  reflect  ojarj^oty 
per  cent  of  the  visual  rays  —  o.S 

speculum  metal  at  its  hast  reflects  only  fifty-six  por 

If  thero  is  ai 
,  ploase  command  us. 

y  further  information 
Sinceroly  yours. 

Binceroxy  .you-ia , 

r  man 


Iavail  Cfflismifi  B©akb 



Aug. 23, 1917. 

Thomas  A. Edison, Esq., 


W. Orange, N.J. 

Dear  Mr  .Edison;** 

The  newspapers  today  give  a  striking  illustra¬ 
tion  of  the  importance  and  urgenoy  of  putting  into  effeot 
the  use  of  this  simple  material  which  you  brought  to  the 
attention  of  the  President  last  Monday.  I  enclose  herewith 
a  copy  of  a  letter  whioh  I  have  addressed  to  the  President. 

I  take  it  that  in  your  absenoe  some  one  in  the  Laboratory 
will  be  in  a  position  to  give  information  and  advioe  so 
that  aotion  may  be  taken  at  an  early  date. 




President  Wilson, 
The  Whits  Houoe, 

Washington, D.C. 

August  23,1517. 

My  dear -Mr.Fresident:- 


„  Jae  purr -a  e  of  the  interview  -ith  Mr.^dioon 

Jn-  ra<i«eet  then  made  that  a  one  Gove  meant 
?S2y-  aire?t  tr*at  praotioal  plana  for  the  safety  of  merchant 
r^rinr  0n^°^03<J>  are  brought  strikingly  before  uo  by  the 

Glft^er  °f  thS  8inking  °f  «» 

,  ,»  Aooorair*g  to  th<s  at&temsnt  made  by  the  Third 
22nd ° in  °n  w  "C^pANA»  -  J.H.Bruoe  l  who  arrived  on  the 
Oliver  ,miA?w!0dn  port'  the  oaPturea  Biippor,  Captain  Alfred 
UAiV-r*  gunners.  v>no  were  taken  aboard  tv,* 

n.nf1<  .  ..  Fro;"  Officer  Bruce* s  account  of  this 

?•  i*  »PPaa»»  plain  that  the  loss  of  the  "CABANA"  was 
due  to  tne  fact  that  the  submarine  out-ranged  her.  He  says; 

"Captain  Oliver  and  his  officers  realized 
tnat  their  snip  was  doomed  unless  they  could 
utave  off.  the  submarine  until  their  wireless 
appeals  brought  help.  The  submarine  seemed  to  be 
several  knots  faster  than  the  'CAMPANA'  -  a 
10  knot  boat." 

=  Here  ia  4  olsar  case  foreseen  by  Mr. Edison 

several  months  ago.  He  laid  before  you  in  skotohes  and 
photographs  a  simple  powder  oai;ed  oleum,  which  ha  dlsohar  ed 
irom  a  snell  in  a  oommon  gun  and  v.hioh  produoed  a  oloud  of" 
sulpnurio  vapor  which  hovered  for  a  period  of  time  over  the 
surface  ana  through  which  a  ship  oould  not  be  Been.  This 
material  is  of  suon  a  nature  that  it  will  attaok  human  flesh. 

J^rough  it.  It  is  inexpensive,  the  amount 
whloh  Mr. Edison  discharged  in  the  shell  costing  Iobs  than 


President  Wilson,-'. 

'j  cents,  yet  it  produced  a  cloud  150  feet  wide  and  about 
50  feat  hieh. 

This  material  has  been  designed  by  Mr  .Edison 
to  rroteot  a  merchantman  where  the  guns  and  the  speed  are 
les.'i  than  those  of  the  submarine. 

Particulars  have  been  given  to  the  Navy  Depart¬ 
ment  and  Mr .Edison  has  furnished  the  Cunard  Covpany  with  a 
sample  of  the  material.  This  sample  returned  personally 
by  Mr.  Beers  of  the  Cunard  Company  to  Admiral  Benson,  who 
told  me  that  it  na a  of  such  importance  that  it  be  kept  3eoret; 
that  tne  merchant  snip  owners  should  not  be  able  to  get  it 
exoept  through  Government  sources. 

To  this  ne  fully  agree,  but  if  the  merchantmen  are 
as  at  present  to  be  left  free  to  look  about  and  use  sundry 
protective  deviceB  not  only  arc  r.e  in  danger  of  revealing 
important  things  like  this,  but  the  safety  of  the  ships 
cannot  bo  assured. 

It  3ce;.-.s  plain  to  practical  men  that  the  ship 
"CAICPASIA",  and  the  lives  of  the  skip- er  and  gunners,  might 
have  been  saved  had  this  simple  preonution  been  taken.  There  - 
fore  I  am  appealing  to  you,  with  great  earnestness  and 
urgeuoy,  to  see  to  it  that  the  Federal  Shipping  Board,  through 
Mr .Hurley,  is  empowered  and  directed  with  the  responsibility 
of  furnishing  at  once  to  all  merchantmen  an  ample  supply  of 
shells  containing  this  Oleum  powder.  The  N.  val  Consulting 
Board  will  take  upon  itself  the  responsibility  of  seeing  that 
the  supply  01  powder  and  the  proper  snails  ar .  furnished, bht 
we. have  no  authority  beyond  that. 

.My  personal  opinion  is  this  lo  so  simple 
and  practical  a  precaution  that  the  Shipping  Board  is  fully 
warranted  in  enforcing  it.  This  I  a.,  advised  by  their  Legal 
Department  they  have  the  power  to  do. 

I  have  sent  a  oopy  of  this  letter  to  the  Secretary 
of  the  N”vy  and  another  oopy  to  Hr  .Hurley . 

Yours  very  truly. 

(J/p~t)  W.  L.  SfcMRS 

lAmiL  Consulting  Bottom 


jTJ'Ell  SPATES  < 

. J  r.j>v 


%  AteXj  s 



Ttf  i  ^  r 
i  *^VV 

To  the""l 

Dear  Sirs:  .  _ 

At  the  mee$L%  trf  thV  Bq^  on  August  18  the  Secretary 
was  directed  to  ask  $£  op^onJsUhe  Attorney  General  of  the 
United  States  on  the  effeot  upon  the  Members  of  the  Board  of 
the  bill  recently  passed  in  Congress,  H.R.  4961,  requesting  his 
advice  as  to  the  steps  to  be  followed  by  the  Members  in  order 
to  comply  with  the  law. 

To  present  the  matter  in  its  entirety  to  the  Attorney 
General  I  should  have  from  each  member  a  memorandum  stating  his 
present  or  contemplated  dealings  with  the  Government,  In 
writing  to  the  Attorney  General  no  reference  will  be  made  to 
these  memorandums  except  to  provide  him  with  a  complete  range  of 
the  activities  and  interests  of  the  members,  in  order  that  his. 
opinion  may  cover,  the  entire. Board. 

Will  you  please  let  roe  have  your  memorandum  at  your 
early  convenience,  so  that  the  matter  may  be  started  promptly. 

Very  truly  yours,  . 




[Public — No.  41 — 65th  Congress,] 

[H.  R.  4001.] 

Be  it  enacted  by  the  Senate  and  House  of  Representatives  of  the  United 
States  of  America  m  Congress  assembled,  That  by  reason  of  the  exist- 
cnco  of  a  state  of  war,  it  is  essentia]  to  the  national  security  and 
defense,  for  the  successful  prosecution  of  the  war,  and  for  the  sup- 
port  and  maintenance  of  the  Army  and  Navy,  to  assure  nil  adequato 
supply  and  equitable  distribution,  and  to  facilitate  the  movement 
°'  ,  r°  ,Vfoc  -■  including  fuel  oil  and  natural  gas,  and  fertilizer 
and  fertilizer  ingredients,  tods,  utensils,  implements,  machinery  and 
equipment  required  for  the  actual  production  of  foods,  feeds,  and 
fuel,  hereafter  in  this  Act  called  necessaries;  to  provent,  locally  or 
•  generally,  scarcity,  monopolization,  hoarding,  injurious  speculation, 
manipulations,  and  private  controls,  affecting  such  supply,  distri¬ 
bution,  and  movement;  and  to  establish  and  maintain  governmental 
control  of  such  necessaries  during  the  war.  For  sucli  purposes  the 
instrumentalities,  means,  methods,  powers,  authorities;  duties,  obliga¬ 
tions  and  prohibitions  hereinafter  sot  fortli  are  crentcd  estab¬ 
lished,  conferred,  and  prescribed.  Tho  President  is  authorized  to 
mako  such  regulations  and  to  issuo  such  ordcra  as  are  essential 
effectively  to  enrry  out  tho  provisions  of  this  Act. 

Sec.  2.  That  in  carrying  out  the  purposes  of  this  Act  tho  President 
is  authorized  to  enter  into  any  voluntniy  arrangements  or  agree¬ 
ments,  to  crento  and  use  any  agency  or  agencies,  to  accept  tho  sor- 
vices  of  any  person  without  compensation,  to  cooperato  with  any 
10  V.hl‘f  T*  ‘‘opartment  or  agency  of  tho  Go v- 
eminent,  and  to  coordinate  tlieir  activ  t  es  so  ns  to  avoid  anv  nrc- 
/  rentable  Iras  or  duplication  of  effort  or  funds.  y  P 

„rS“- ?•  "°  Pap?,11  acting  cither  ns  a  voluntary  or  paid  agent 

1  °T  arnployco  of  tho  United  States  in  any  capacity,  including  an  ad¬ 
visory  capacity,  shall  solicit,  induco,  or  attempt  to  induco  any  porson 
°r  cor  authorized  to  oxecuto  or  to  direct  tho  execution  of  con- 
tracts  on  behalf  of  the  United  States  to  make  any  contract  or  give 
any  ordor  for  the  furnishing  to  tho  United  States  of  work,  labor  or 
afT“?,  or.,of  materials,  supplies,  or  other  proporty  of  any  kind  or 
character,  if  sucli  n^ent  or  employee  has  any  pecuniary  interest  in 
such  contract  or  prefer,  or  ifhoormiy  firm  of  winch  I.eYs  amimber 
nfr,^rPOrttt'i°"l  i01i'!it‘3took  company,  or  association  of  which  ho  is  an 
officer  or  stockholder,  or  in  the  pecuniary  profits  of  which  ho  is 
directly  or  indirectly  interested,  shall  bo  a  pnrty  thereto.  Nor  shall 
?"?  "80M  .°r  cmployco  make,  or  permit  any  committee  or  other 
body  of  which  ho  is  a  member  to  make,  or  participate  in  making,  any 
recommendation  concemmg  such  contract  or  ordor  to  any  council 
board,  or  commission  of  tho  United  States,  or  any  member  or  sub- 
1’1—  t>,cre°f-  "’ltl.'°ut  “nWng  t9  tho  best  of  his  knowledge  and 
belief  a  full  and  complete  disclosure  in  writing  to  such  council,  board 

August  £4,1917. 

Lucius  H.  BeerB,  Esq.., 
c/o  Lord,  Day  &  Lord, 
49  Wall  Street, 

Hew  York,  H.Y. 

Dear  Hr . • Beers : 

lief  erring  to  your  favor  of  tho  fist 
inatant  in  roforenco  to  the  '‘Kite  Rudder"  let  no  say 
that  Hr.  Edison  is  at  present  away  from  tho  Laboratory 
conducting  somo  of  his  experiments  for  the  Government. 

1  sent  your  letter  to  him  by  a  Messenger, 
and' he  wishes  no  to  say  to  you  in-,  reply  that  he.  is  at 
Gar  Harbor  with  tho  Sachem,  a  U.  S.  a.  aubraarino  Ch^eo- , 
und  he- will  trv  experiments  with  the  kite  rudder,  firs*, 
on  a  60  foot  boat,'  then  on  tho  Sachem,  itself;  which  is 
180  feet  long.  Afterwards, hS  will  send  his  men  on  a 
cargo  boat  and  when  they  get  outside  of  Sandy  .iook  they 
will  try  how  quickly  they  can  turn  the  boat.  Hr  .Edison 
says  his  raon  can  retain  in  tho  Sachora. 

Yours  very  truly. 

Assistant  to  hr.  Edison. 

P.S.  Op  to  this  timo  I. have  boon  able  to  koo?  out 

of  tho  newspapers  any  roforonco  about  Mr.  Edison 
"  ‘  i  tho  Sachem,  so  will  you  please  keep  tho 


Mr..  C.  E-  Bedford,  • 
c/o  Vacuum  Oil  Company, 

61  Broadway, 

II bw  York,  li.Y. 

Dear  Mr.  Bedford:  . 

Your  favor  of  tho  21ut  instant  to 
Mr.  Edison  was  received,  and  I* sent  it  by  Kossenpor 
to  him,,  as  he  is  away  from  the  laboratory  for  a  tine 
making  some  experiments  for  the  Government. 

Ho  has  returned  the  letter  to  me  and  wishes' 
mo  to  thanl: 'you  for  your  explanation  and  also  to  ox- 
press  the  hope  that  the  oil  may  soon'be  roceivod  in 

If  it  is  not  troubling  you  too  much,  will 
you'  Kindly  issue  instructions  to  have  a  traeor  sent 
after  tho  shipment. 

Yours  vory  truly. 

Assistant  to  Mr.  Edison. 

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United  states  Shipping  board 


August  24,  1917. 

Mr.  Thomas  A.  Edison, 

Orange,  H.  J. 


1  beg  to  acknowledge  receipt  of  your  letter 
of  August  16th,  addressed  to  the  Honorable  JoBephus 
Daniels,  Secretary  of  the  Davy,  and  forwarded  by  him 
to  us  with  a  copy  of  your  blue  print  illustrating  your 
water  tight  rudder. 

We  note,  with  interest,  the  preliminary 
experiment  which  you  made  with  a  small  launch  in  the 
PaBsaic  River.  We  shall  await  your  further  applica¬ 
tion  of  this  idea  to  merchant  vessels. 

We  all  enjoyed  the  visit  you  paid  us  on 
Monday  and  feel  sure  the  personal  contact  with  those 
of  us  who  are  trying  to  assist  in  solving  the  submarine 
menace  will  he  a  great  stimulus  to  the  work. 


Very  truly  yours, 



august  £6,  1917 

Major  Odus  C.  Korney,  O.K.C., 

War  Department,  Cannon  Geetion, 
1330  F  Street, 

Washington,  D.  C. . 

Subject:  3-inch  Field  Gun,  smooth  boro, 

for  firing  projectiles  that  will 
not  ricochet. 

Mr.  Edison  wishes  mo  to  reply  to  your  favor 
of  tho  £2d  instant,  in  reforonce  to  3-inch  smooth  boro 
field  gun.  ,  ' 

'  Ko  says  that  ho  will  not  use  more  than 
of  the  service  charge  of  powder  that  is  now  ucod 
3- inch  gun. 

in  a 

Ha  wishos  mo  also  to  say  that  Admiral  Kurd 
of  tire  Brooklyn  llavy  Yard  bored  out  tho  one-pounder 
llaval  -gun  that  ho,  Ur.  Edison,  has  been  using,  and 
say 8 , that  if  iir.  Edison  sends  him  the  3-inch  gun  ho  will 
boro  it  out  (prickly. 

Mr.  EdiBon  says  he  does  not  want  any  evidence 
of  tho  rifling  to  show  and'  wants  the  interior  of  the  gun 
well  polished.  fhe  diumotor  should  bo  such  that  it 
will  ropove  the' rifling  and  no  more. 

Yours  very  truly. 

Assistant  to  iir.  Edison. 


Augus t  20,  191V • 

”•  “ssia^SitSrffl,o*  «»  "»»«a 
18  ^SWu.n. 

Dour  lir .  Robins : 

Your  circular  letter  of  the  23d 
instant  to  the  Members  of  the  Raval  Consulting  Board 
in  regard  to  the  bill  recently  passed  in  Congress, 

H.  R.  4961,  was  forwarded  by  no  to  Mr.  Rdison. 

■X  have  3ust  hoard  from  him  and  ho  wishes 
mo  to  say  that  the  only  thing  no  soil  to  tho  Govern¬ 
ment  lo  Storage  Batteries,  and  the  prices  have  not 
been  changed  for  several  years. 

Yours  very  truly. 

Assistant  to  Mr.  Edison. 



August  2C,  1017 

Ur.  11.  II.  Leigh,  Assistant, 
Buroau  of  Steam  .engineering, 
Davy  Department, 

Washington,  D.  C. 

Your  £42440-647-10-1;  ' 

Dear  Sir:- 

Vx.  .Edison  is  away  from  tho  Laboratory  attend¬ 
ing  to  porno  experiments  for  the  Government.  X  sent  to 
him  your  favor  of  the  L2d  instant  in  regard  to  tho 
"magnetic"  telephone  system,  and  have  just  received  a 
memorandum  from  him  ashing  me  to  write  to  you  ae  follows: 

"I  have  no  magnetic  Byston.  I  was 
told  that  in  gun  practice  it  was  difficult  to  hear 
the  ordinary  telephone  and  also  tho  microphones 
used  packed,  etc.  I  suggested,  using  Bell  ’phonos 
and  audions.  I  tried  tho  experiment  at  tho  Labora¬ 
tory,  and  sliowod  it  to  Officors  of  tho  Brooklyn  Xlavy 
Yard.  I  linvo  no  interoct  in  it,  and  it  is  a  matter 
of  indifferoneo  to  no  whether  it  is  used  or  not." 

Yours  very  truly. 

Assistant  to  Iir.  3dison. 


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T.  Shriver  &  Company 



Harrison,  N.J.  August  26,  1917. 



i™  uw.  EU- .  .Edison  as  follows: 

W-  h*JU> 

i  to.  Mr . 

Mr .  Meadowcrof t , 

My  dear  Sir, 

On  Aug.  18th.  I  wrtft 

Mr.  Thos.  A.  Edison, 

Dear  Mr.  Edison, 

Can  you  not  use  me  in  some  of  your  Government  research  work? 

My  business  is  well  organized  and  requires  very  little  of  my  personal 

I  want  to  do  something  for  my  Government,  and  feel  that  what  talent 
I  have  would  be  of  most  use  in  research  work. 

Of  course  there  would  be  no  question  of  remuneration. 

I  have  tried  several  times  to  have  a  talk  with  you,  but  have  been  un¬ 
able  to  get  beyond  your  gate  house. 

I  wish  you  would  try  me  out.  I  might  be  of  some  \ise,  and  if  not  you 
can  simply  tell  me  to"move  on'.' 

Yours  truly. 

H.  T:  Shriver. 

As  I  have  had  no  reply,  I  take  it  for  granted  that  the  letter  never 

I  would  consider  it  a  favor  if  you  would  see  that  Mr.  Edison  gets 
this  and  let  me  know  his  wishes  in  the  matter. 

J>,apkj  JLm  A*-  My 

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fly  Washington  DO  August  27  1917  ‘W  M‘C  1  £/•/*'  //t*^ 

■  Thomas  A  24  is  on  ^ 

Orange  H.J.  .  fin"-  'u  |  ' 

Mr  SaunaerB  ana  myself  are  anxious  to  have  your  ohief  / iS/'? 

engineer  aisouss  matt era  in  question  with  my  representative  W  » 
MoGuire  who  will  he  in  Orange  tomorrow.  Can  you  see 

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,  W  H  1,1  E  AD  OWC  RO  FT 

eoisom  laboratory., or amge  mj. 


T° SSfc 

Aug.  29,  1917. 

Hr.  Harpy  E.  Shriver, 

Hamilton  St.  &  Franklin  Avo., 

Harriaon,  How  Jersey. 

Boar  Sirs- 

X  have  received  your  fuvor 
of  the  2dth  Inst.  Your  letter  of  the  10th  inst. 
to  Hr.  Edison  was  received,  but  he  is  away  from 
tho  Laboratory  at  the  present  time  and  no-one 
knows  definitely  when  he  will  rotum.  It  may  be 
this  week,  or  it  might  be  ten  days,  two  wee,; s 
or  longer,  no-one  can  toll. 

Once  in  a  while  I  send  a  few 
things  to  him,  and  the-  first  chance  I  get  I  will 
enclose  your  letter  in  one  of  ny  packages, 

Yours  very  truly. 

Asst,  to  Ur.'  Edison. 


2 l .  J.  lie  A  V*  /J  'J-_ 

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New  York 

Aug. 29, 1917. 

Thomas  A. Edison, Esq., 

Dear  Mr  .Edison:- 

I  sent  you  a  copy  of  my  letter  to  the  President 
in  reference  to  your  acid  fog.  I  enclose  a  copy  of  the  President's 

I  was  in  Washington  last  Sunday  ajfl  Monday.  X  saw 
Mr. Hurley,  the  Chairman  of  the  Shipping  Board ,/on^roth  days.  He 
sent  for  a  Mr.MoGuire,  and  with  McGuire  I  went-cv^:  to  see  Admiral 
Earle  and  Commander Kearney  of  the  Ordnanoe  Department.  Both  the 
Admiral  and  the  Commander  were  present.  /  y 

Commander  Keamgy  takes  an  intelttlgefvt  view  of  the 
whole  situation,  hut  says  that  it  is  not  such  a  simple  problem  as 
one  might  suppose  to  discharge  these  aoid  bombs. 

He  thinks  the  guns  should  be  provided  with  shells  to 
fire  the  bombs  as  dose  to  the  submarine  as  possible.  In  suoh 
oase  it  will  require  a  large  shell  with  a  time  fuse.  He  does  not 
favor  oontaot  of  the  danger  on  shipboard, 

CommanderKearney  wants  more  particulars  about  Oleum 
powder.  He  would  like  you  to  give  him  sufficient  samples  so  that 
he  may  make  some  experiments.-  He  says  that  it  should  not  be  mixed 
with  nitro-glyoertne  or  dynamite  beoause  of  the  danger.  He 
wants  to  mix  it  with  T.N.T,  or  some  other  explosive.  He  realizes 
that  very  little  explosive  is  required  to  burst  tne  snell  and 
scatter  the  material. 

I  trust  that  you  will  have  some  one  get  in  direct 
communication  with  Command  a  r  jearney  and  see  that  he  gets  all  tne 
information  from  your  end.  Mr .Hurley  is  determined  to  push  tnis 
to  an  issue. 

You  have  notloed  the  newspapers  of  late.  One  state¬ 
ment  is  made  that  a  British  steamer  esoaped  a  German  submarine 
which  pursued  her  for  several  hours,  the  esoape  being  due  to  a 
natural  fog  whioh  soreened  the  ship  from  the  enemy. 

Another  oase  is  that  of  a  Frenoh  vessel  where  the 
passengers  arriving  last  Monday  report  that  smoke  soreens  were 
thrown  overboard  in  the  presenoe  of  a  submarine,  enabling  the 

Thomas  A. Edison, Esq., -2. 

ship  to  esoape.  I  enclose  the  dipping  in  thiB  case  as  it  is  of 
special  interest  in  view  of  the  fact  that  you  asked  me  in  Washing¬ 
ton  reoently  how  these  smoke  hoxeB  oould  protect  a  ship.  This 
screening  by  smoke  boxes  has  been  recommended  by  the  Naval 
Consulting  Board  and  is  embodied  in  a  oiroular  issued  by  the 
Federal  War  Risk  Bureau  putting  a  penalty  on  all  ships  whioh  do 
not  oarry  one  dozen  of  these  boxes. 

I  look  at  the  smoke  box  as  affording  some  measure  of 
safety  while  your  plan  of  an  aoid  fog  goes  a  great  deal  further. 

In  other  words,  the  smoke  box  is  one  step  in  the  direction  of  your 
aoid  screen. 

As  soon  as  the  Ordnance  Department  prepares  the 
shells  it  is  my  purpose  to  see  that  the  Federal  War  Risk  Bureau 
exacts  a  penalty  in  war  risk  insurance  where  this  device  is  not 

I  am  anxious  to  hear  about  your  recent  experiments 

at  sea. 

With  oordial  regards,  I  remain. 

Yours  very  truly, 




For  Mr. Edison. 



24  August, I917. 

My  dear  Mr. Saunders: 

Thank  you  for  your  memorandum  of 
August  twenty-third.  I  appreoiate  the  force 
of  the  example  afforded  by  the  CAMPANA  and 
you  may  be  sure  will  do  everything  in  my 
power  to  see  that  Mr .Edison's  ideas  are  put 
into  execution. 

In  haste 

Slnoerely  yours, 

Woodrow  Wilson  (signed). 

Mr .William  L. Saunders, 
11  Broadway, 

New  York  City; 



1330  F  STREET  ff/og 

August  29,  1917. 


Ur.  Thomas  A.  Edison, 
Orange,  N.  J. 

Dear  Sir: 

SUBJECT :  3-inch  Field  Gun,  smooth 

bore,  for  firing  projectiles 
that  will  not  ricochet. 

1.  Replying  to  your  communication 
of  the  25th  instant,  I  beg  to  inform  you  that 
the  instructions  have  been  given  to  have  a  3- 
inch  field  gun  and  carriage  shipped  from  the 
Sandy  Hook  Proving  Ground,  Fort  Hancock,  H.  J. 
to  Admiral  Eurd  of  the  Brooklyn  Navy  Yard. 

It  i3  presumed  that  you  will  give  Admiral 
Burd  the  necessary  information  to  enable  him 
to  prepare  this  gun  for  the  experiments  whioh 
you  wish  to  undertake. 

Respeot fully, 


Major,  Ordnance,  U.S.R. 


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29MYU  47  ML  ML 





702 AM  SEPT  6-17 

X  am  sorry  I  was  not  here  at  the  mill  when  you  oallea  on 
the  'phone.  However,  our  Manager,  Mr.  Clark  tola  you,  I  be¬ 
lieve.  that  we  wouia  he  very  glaa  to  ao  all  we  can  for  you, 
which  confirms  my  letter  to  you  of  some  weeks  ago.  We  are,  as 
I  tola  you,  sola  out  up  to  our  full  oapaoity,  for  X  shouia  think 
■  -  ’  -  — =  -  '-!•»  +  -  omfl  mrmlnff  our  W0rk8  all 

3  wouia  like  to  ao  so.  There  is  apparently  e 

more  than  a  year  ana  a  half  to  come  ana  running 
night  ana  all  aay.  We  cannot  accept  or der s^f rom^ new jf ouna 
frienas,  much  as 
famine  in  tubes. 

But  to  help  my  friena,  Mr.  Thomas  A.  Eaison,  we  will  stop 
ana  make  anything  he  may  aBk  for,  ana  put  it  in  prooess  of  manu¬ 
facture  at  once.  I  want  Mr.  Eaison  to  feel  free  to  ask  at  any 
time,  any  aia  I  can  give  him.  It's  a  pleasure  ana  a  privilege, 
not  only  to  help  him  personally,  but  to  serve  his  country  ana  my 

I  unaerstana  that  you  want  135  feet  seamless  Brass  Tubing, 

2"  0.  D.  x  #21  Gauge.  We  can  haraiy  enter  this  orier  in  a  mes¬ 
sage  over  the  telephone,  there  might  be  some  errors  in  it.  If 
you  will  kinaiy  Beni  us  your  oraer  ana  tell  us  if  you  want  the 
tubing  finished  hara  ana  stiff,  or  if  you  want  it  soft  ana  pli¬ 
able  for  benaing,  we  will  put  it  in  process  of  making  immeiiately. 
Also  tell  us  the  shortest  lengths  you  couia  use,  then  we  will 
know  Just  what  you  want.  Tell  Mr.  Eaison  our  principal  business 
iB  Seamless  Steel  Tubes,  but  we  oan  make  for  him  Brass  ana  copper 
Tubes  ana  Aluminum  Tubes,  ana  will  be  glaa  to  go  out  of  our  way 
to  ao  so.  We  make  tubes  from  the  little  fellows,  not  much  bigger 
than  a  horse  hair,  on  up  to  3-1/2"  or  4"  in  aiameter. 

Ur.  Meadoworof t, 


Give  my  kindest  regards  to  Mr.  Edison  and  reserve  a  share 
for  yourself. 



Very  truly  yours,  /i 



To-  lahatory  ThomaB  A.  Edison, 

Attention  Mr.  Win.  A.  Meadowcroft, 
Orange,  New  Jersey. 

Asst,  to  Mr.  Edison, 

V.  U,yY\jLacUr'^C,'u-Jt: . 

.  ^'.0  Lv;^7\(  £r<vvi.  J  J 

J>  li£,t  tS^.^CJ  i-vCVM.  . - 

>1  WaVJ  WX^Ct  G^G  \us2S^  Jit  (f^d, 

.  . . '. . TV.  .  . .  . . 


MVUXrUi  ZI2  fi.VA 


September  6,  1917 

Ur.  Ellwood  Ivina, 

'^k  lane  Station, 

■t-hllaaolphia,  Penn. 

tty  dear  Ur.  Ivinas 

It  is  a  great  pleasure  to  receive  your  cordial 
letter  and  to  have  ouch  a  prompt  an-  willing  rosponce  to  Ur. 
Euisons  appeal  .'  He  is  away  on  tho  submarine  ch.ser,  but  I  have 
oosmunicatcd  with  him  an-  he  groatly  appreciates  the  holding  yo  extend  to  him  at  this  time,  when  it  ip  so  difficult  to 
got  manufactured-  mutoriala. 

I  was  in  telephone  conversation  with  your  Ur. 
Curding  this  morning.  I  asked  him'  to  msdce  ISO  feet  of  brass  tub 
in;  2  inches  outside  diameter,  l/;;2  inch  wall,  and  herewith 
I  han-i  yon  our  Purchase  urdor  to  cover  tho  c:me.  although  the 
ordor  o:.y8  6  foot  longths  you  m  y  disregard  th  t  part  and  m  ko  it 
in  lonaora  lengths  as  per  ny  later  oouvorsation  with  Ur.  Cording.' 

With  kindest  rogards  ana  oincore  thinks  in  bo 
half  of  both  Ur.  Edison  ana  myself,  I  remain 


Very  truly  yt 


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cc//eu'i . . 

^  <  ({ .  hit  Ok. *>Vt  . 

deptembor  7,  1917. 

Lucius  H.  Beers,  Ksq., 

49  ball  Street, 

lion  York  City. 

Uy  dear  i,!r.  3oers: 

ihcperiraentc  go  far  made  at  soa  with  dummy  per¬ 
iscope,  towing  away  from  observing  boat,  prove  that  the  best  way 
to  detect  periscopes  from  a  cargo  boat  is  by  observing  through 
port  holes  at  loast  1£  inches  in  diametor  (  the  size  on  our  boat, 
B.  P.  19 £  ),  and  not  higher  than  33  inches  above  tho  water,  The 
port  holes  are  kept  open  as  long  as  no  water  comes  in  and  closed 
by  clear  glees, -(best  plate  glass), when  the  vator  splashes  badly. 
Tho  observing  Bhould  be  done  with  an  ordinary  rr/a  g  1/4  inch 
opera  glass,  costing,  I  thin!:,  in  quantity,  about  10  to  1L  dollars 

'  There  should  be  4  or  b  port  holes  on  each  side 

of  the  ship,  one  on  either  side  of  the  bow  just  at  the  rounding 
part,  and  one  near  tho  stern  and  two  on  the  sidoB. 

It  seems  impossible  to  fail  Eeoing  a  periscope 
only  four  feet  high  at  u  distance  of  twobmilos.  It  stands  out 
sharply  against  the  sky  line.  un  deck  it  is  almost  impossible 
to  see  it  at  all  where  it  has  water  for  a  background.  The  peri¬ 
scope  observers  1  had  on  tho  sido  of  tho  shipbwere  not  successful 
as  tho  mirrors  tarnishod  and' there  ia  too  much  loss  of  light. 

t  I  tried  out  tho'  smoke  producing  floats  to  fako 

a  s'tbamors  smoko, but  v.hllo  they  v.ero  0.  &,  when  there  was  but 
littlo  wind,  thoy  were  ridiculously  inadequate  with  a  strong  wind. 

1  am  now  building  ono  that  will  bo  effective  in  a  very  strong  wind. 

As' the  Government  is  slow  doing  anything  with 
tho  smoko  shell'  to  be  firod  from  tho  3  inch  Uuval  guns,  I  am  making 
a  bomb  to  bo  fired  from  tho  Lylo,  or  life-line,  gun  carried  by 
every  ship  in  the 'world-.  Tills  bomb  1  will  perfect  mycolf.  itv 
will  be  cheap,  can  bo  fired  by  the  crew,  and  will  place  tho  smoko 
just  whoro  it  is  wanted,  independently  of  the  wind,  and  thus  give 
cargo  boats  that  havo  no  liaval  guns  some  dogreo  of  protection. 

,  ,  v,e  are  having  Rood  one c ear,  with  the  kite  rudder 

T°rnnt  trt  tUr5in?  ?  k°at  5Ui?kH  t0  riSJ^  anGlGS  to  her  00UT80. 
i  v.ant  to  perfoct  the  mechanical  details  and  etandardisso . 




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165  NYU  7 





September  10,1917 

PHitSvJliAL ; : : ; : 

Ur.  H.  L.  Saunders, 

11  Broadway, 

Hew  York,  11  .Y. 

l!y  doar  Ur.  Saunders: 

Kxporimentij  made  today  prove  smoko 
bomb  effective,  pven  with  greatest  error  given  by  the 
Bureau  for  the  tine  fuse-  Che  statement  that  it  is 
dangerous  to  use  Oleun  is  based  on  lac;-,  of  information, 
be  ure  making  bombs  right  along.  2.  11.  2.  is  made  in 

Cargo  boats  do  not  have  to  shoot  at  various 
ranges.  ivory  shot  can  bo.  one  mile,  and  shells  can  be 
loaded  as  they  aro  needed.  I  have  made  no  reply  to  the 
Bureau,  as  it  would  bo  useless.  I  will  let  you  do  the 
fighting.  If  you  need  any  information,  let  mo  know. 

You  con  rest  assurod  that  the  smoke  bomb  is 
O.kv  and  every  etatomont  made  in  the  Bureau  of  Ordnance 
report  is  the  opposite  of  the  fact. 

She  only. thingsl  sond  to  Soorotary  Duniels 
aro  results  of  oxporiments,  or  requests  for  advice,  '-ho 
Gmoko  shell  blue  print  with  experiments  on  which  it  was 
based  was  cent  to  Bocrotary  Daniels  with  the  roquost  that 
they  adviso  mo  if  tho  construction  was  corroot.  .  You 
will  note  in  their  report  that  the  construction  was  correct 
Chon  thoy  launch  off  intlo  criticism  bi-.s^d  on  ignorance 
and  total  lack  of  imagination. 

Yours  very  truly,  ^ 

uoptoabor  1j,1'J17 

i,!r.  15.  1.  Li  minders, 

11  Broudnay, 

lion  York,  li.Y. 

Uy  dear  l!r.  Suundors: 

I  oncloLO  photogruph  of  tho 
quick  turning  of  iiaohoh,  "10  foet  long;  with  regular 
ruddor  togothor  Tilth  a  kito  ruddor  of  half  else. 

X  am  having  groat  trouble  in  getting  a 
proper  to  launch 'tho  kito  ruddor  rapidly  and 
practically  at  full  speed.  lioto  tho  whirls  made 
by  tho  kito  ruddor. 

Yours  very  truly. 

Cy  t„  Lucius  il.  Boors,  Lcq. , 



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.  ;>  |  ’  "htf-U  I'Ae  c^f-uvd*  » <. 

(?l|  Kite.  ^ 

iJr  •  .Kennedy :  , 

X  huve- received  your  telegram  today  giving 
your  address  as  Groonport,  L.I.,  and  wo  Id  be  glad  if  y 
will  let  me  know  just  v;ho  is  on  your  boat  so  that  wo  ran 
bo  able  to  forward  nail  intelligently . 

Ko  are. all  well  here  and  trust  every  one 

in  your  contingent  is  too. 






Instructions  have  been  issued  to  the  Special  Board 
on  Naval  Ordnance,  of  which  Rear  Admiral  R.  R.  Ingersoll, 
U.S.H,  is  senior  member,  and  to  the  Inspector  of  Ordnance, 
Naval  Proving  Ground,  Indian  Head,  Ud.,  to  proceed  with 
a  test  and  investigation  for  the  purpose  of  definitely 
ascertaining  the  military  value,  possible  uses,  ard  the 
limitations  of  oleum  as  a  filler  for  gas,  smoke  or  fog 
shells  in  naval  anti-submarine  operations. 

The  Secretary  of  the  Navy  has  indicated  to  this 
Bureau  that  you  may  desire  to  be  present  at  the  Haval 
Proving  Ground,  Indian  Head,  Kd.,  during  the  test  of 
this  material. 

The  Bureau  will  advise  you  in  the  very  near  future 
as  to  when  these  firings  are  to  take  place,  and  hopes 
that  you  and  the  other  members  of  the  Naval  Constilting 
Board  will  find  it  convenient  to  be  present. 

Very  truly  yours. 

■Wo.  a  ciu-t-  . 

w^  M**  ■iM**'~*K^ 

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. . 

to . mmm.MYX.KTi.. . .  at,-..Br.o.oxasn,..Ji.i. . ------ 

Quartermaster  at _ Handy  Hook_Pxati.n&-Uround-...H.J. . Bm.axmtittb.Mtamw.. . . 

in  ^..UiaH,  .— itli  »  966  CorAaar,.§ntgpjy. 

t  i- 

34i"YJ  36  ML 

NEWLONDO*'  COM*1’  SEP  10 


03 1  80^  |<"C  ORANGE  m.J. 

IT  but  have  not  recd  any  YET  many  THANKS 


L.  A  {  , 

^  L  -r(  „yi. 

554  AM 

State  of  How  Joroby) 
County  of  Essex  ) 

It  ii.  Arthur  Wolf,  of  537  Bergen  Street,  Newark, 

Hew  Jersey,  depose  and  say  as  follows: 

(a)  I  have  been  employed  in  the  Draughting  Department  of 
the  Edison  laboratory  for  about  sevon  years,  and  am  a.  oho 
present  time  tho  Chief  of  that  Department;  my  age  is  20,  and 
my  present  salary  is  $86.00  per  week,  (b)  Uy  employer  is 
Thomas  A.  Edison,  Orange,  H.J..  and  inventor  by  profession. 
(c)-(di-(e)  .Hy  employer,  Ur.  fhomns  a.  Edison,  is  engaged 
in  conducting  a  large  number  of  special  experiments  for  the 
United  btates ' Government  at  the  request  of  the  bocretary  of 
the  Entry,  fhese  experiments  cover  an  extensive  range  of  sub¬ 
jects,  and  lir.  Edison  requires  constantly  a,  very  great  variety 
of  mechanical  drawings;  which  usually  have  to  ho  made  with 
great  speed.  1  am  accustomed  to  having  these  drawings  made 

from  lir •  Edison's  rough  outlined  sketches  and  also  from  his 
oral. or  written  instructions.  Practically  all  of  those 
drawings  at  the  present  time  cover  apparatus  which  Ur.  Edison 
la  having  made  for  his  experiments  for  the  Government,  and, 
therefore,  .they  are  very  confidential,  (f )  Shore  are  eight 

employees  in  my  Department,  consisting  of  myself  and  seven 
Draughtsmen,  (g)  .  So  as  I- too.  the  labor  market  could 
furnish  a  number  of  Draughtsmen,  but  could  not  furnish  a  specialist 
with  ray  experience  of  Ur.  Edison's  work.  .there  is  no 
the  laboratory  who  has  had  the  experience  that- I  have  had. with 
Edison ‘t/  experimental  work.,  and  I  believe  it  would  be 

difficult  for  him  to  replace 
to  tho  Government  work* 

without  delays  and  detriment 

State  of  Hew  Jersey 
County  of  Bssox  \ 

I,  William  H.  lleadowcroft,  of  Boonton,  How  Jersey, 
depose  and  auy  as  follows: 

1.  I  am  the  personal  assistant  and  Private  Secretary  of 
Thomas  A.  Bdison,  of  Orange,  lien  Jersoy,  inventor.  The  reason 
i  make  this  affidavit  is  that  Hr.  Kdieon  is  away  from  the  lab¬ 
oratory  conducting  some  opocial  experiments  on  national  orVcnse 
and  dofense  for  the  United. states  Government,  and  X  do  not  know 
nhon  he  will  return  to  Orange. 

2.  I  have  read  .the  affidavit > ( dated  this  day)  made  by 

U.  .-.rthur  Wolf,  of  137  Borgon' Street,  Hewark,  Bev;  Jersey,  and 
horoby  certify  and  state  of  my  own  knowledge  that  tho  same  it 
true . 

3.  The  said  11.  Arthur  Rolf  is  tho  Chief  of  tho  Draughting 
Boom  of  Hr.  liaison 's  laboratory  and  during  tho  seven  years  that 
ho  has  been  employed  in  the  Draughting  Hoorn,  ho  has  become  export 
in  his  knowledge  and  understanding  of  Hr.  iidison's  rough  sketchos 
and  written  descriptions  of  special  apparatus  which  ho  Wishes 

to  have  tnado,  ana  for  which  it  is  first  necessary  to  have  mochan- 
ical  drawings.  Hr.  Kdieon’.s  experiments  are  unlimited  in  scope 
and  Variety,  ana  necessitate  a  Chiof  Draughtsman  who  can  put  them 
quickly  into  effect  through  working  drawing. 

4.  Hr.  Bdison's  laboratory  is  not  making  any  regular  product 
under  contract  or  otherwise,  but  is  engaged  under  his  direction 
in  oxi  erimental  work  for  the  Government.  The  employees  of  the 
laboratory  arc  mostly  exports  in  various  lines,  trained  under  Ur. 





Edison's  directions,  tho  said  Wolf's  training  having  been  on 
the  interpretation  of  sketches  and  idoas  for  various  kinds  of 
experimental  apparatus. 

5.  It  would  not  he  possible  to  replace  Wolf  with  a  man  who 
could  do  the  work  without  a  groat  deal  of  training,  and  if  he 
were  taken  away  from  the  laboratory  there  would  result  to  the 
Government  a  groat  detriment  owing  to  the  delays  that  would  in¬ 
evitably  occur  in  the  experiments  that  ilr.  Edison  is  conducting 
day  and  night  for  tho  Government. 


Subscribed  and  sworn  to  ) 
before  me  this  10th  day  of  ) 
September,  1917.  ) 


nwicn  of  ti.h  MUUW  CHAIRMAN 


11  Broadway,  Hew  York 


Thomas  A.  Edison,  Esq.., 

Orange,  H.J. 


Bear  Mr.  Edison: 

This  mailer  has  b^en  definitely  settled.  Mr.  Hurley 
and  I  were  appointed  a  committee  of  two  to  see  the  Secretary  of  the 
liavy  last  week.  Vie  went  there.  He  instructed  the  Ordnance  Depart¬ 
ment  to  immediately  make  and  test  some  acid  fog  bombs,  as  recommended 
by  vou.  The  Secretary  said  to  the  Commander:  "Coinmanaer ,  you  may  be 
right  in  this  matter,  but  the  public  will  think  that  Edison  is  right, 
so  go  ahead  and  test  them." 

The  Secretary  gave  instructions  that  Mr.  Hurley  and  I  are  to  be 
notified  and  to  be  present  when  the  tests  are  made. 

I  received  the  two  memoranda  you  sent  me.  Hurley  telegraphed 
McGuire  to  go  up  to  Hew  London  and  seo  you  as  requested. 

I  am  much  interested  in  your  kite  rudder  experiments  ana  thank 
you  for  the  photograph  accompanying  your  letter  of  the  10th. 

I  have  no  doubt  that  you  have  thought  of  it,  but  it  seems  to 
me  that  this  kite,  like  any  other  kite,  should  have  a  tail  or  that  it 
should  be  made  on  the  box  kite  principle. 

Mr.  Edison  wrote  in  pencil  as  follows  -  original  sent  to  Saunders: 

Saunders ;  , 

Since  my  last  letter  to  you  I  have  made  some 
3  inch  chells  out  of  gas  pipe  filled  with  01e^and._placed.fthem_wi;  , 
poles  and  exploded  them  electrically.  •**  — * 

Both  shells  were  effective,  showing  that  if  the  time  fuse  was  more 
than  twice  as  defective  as  stated  in  Ordnance  report,  it  would  still 
be  O.K..  In  fact  every  statement  made  is  incorrect. 

(over ) 

H  o  thw i ths t  and ing  their  tests. will  he  made  at  Indian 
Head,  X  shall  keep  on,  make  standard  shells  and  fire  them  from 
a  real  3  inch  gun  to  be  sure. 

Hr.  John  A.  Brashear, 

Pittsburgh,  Pa. 

Dear  Hr.  Brashear: 

On  August  20th,  we  wrote  to  you  in 
regard  to  silvering  glass  mirrors.  Copy  of  the  letter 
is  hereto  attached. 

You  very  kindly  replied  and  your  letter  came 
to  hand,  but  we  cannot  find  it  in  our  files.  I  rather 
think  that  Hr.  Edison  put  it  in  his  pocket,  and  he  is 
away  just  now  and  will  probably  not  return  for  some  time. 

He  wishes  one  of  our  Experimenters  to  do  some 
work  for  him  on  this  line,  and  I  am  writing  to  ask  if 
you  will  kindly  favor  me  with  a  copy  of  your  reply  to 
Hr.  Edison,  so  that  we  can  go  ahead  with  the  work. 

Yours  very  truly. 




Ur.  nX  "  Jentsch, 

5b4  Lirinpcton  street, 

Ulioaboth,  II.  J. 

Dear  Liir:-  ‘ 

.  Your  favor  of  the  3oth  ulti:no  rocoivcd. 
r.  3d i son  has'bcen  from  the  laboratory  for  scveial 
.  „o"::  but  v.o  sont  your  lottor  dov-n  to  him,  and  he  v: ichcg 
us  to  say  in  reply  that  he  is  nov.  oxporinentilif;  with 
artificial  fop;  and  smoke  at  sea,  to  moot  all  .eondi  V  one 
as  far  as  possible.  Ho  finds  there  are  many  change:;'  • 
and  soinetino  up o  found  that  he  nay  have  to  initslo  a 
rain  storm,  and  has  boon  workinr  alonr  those  linos. 

.Yours  vo ry  truly, 

Hdison  laboratory. 

•  .-1/3034 . 

U6NYV..  16 

NEWLONDON  COMM.  830P  SEP  12-1917 




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iir.  Harry  2.  Ivor, 

Hamilton  o treat  U  i’ri.nklin  Ave., 

Harrito  n,  11.  J. 

Dear  Hr .  Ghrivor : 

At  last  I  have  a  reply  for  you 

from  Ur.  Hdison. 

He  wishes  -mo  to  say  to  you  that  when  hie 
boat  gots  into  the  waters  around  llow  York  Harbor, 
he  thinks,  you  nay  he  able  to  holp  him  out  oh  some 
of  his  work  for  the  Government .  He  will  let  you 
know  when  the  proper  time  cones. 

'In  the  meantime,  ploaeo  do  not  mention 
that  he  is  away  on  a  boat.  •  file  public  has  an  idea 
that  he  is  av.ay  on  a  vacation. 

Yours  very  .truly. 

Assistant  to  Hr.  iidison. 



September  13,  1917. 

Submarine  Defer 

i  Assn. 

Thomas  A.  Edison,  Esq. , 

Orange,  New  Jersey. 

My  dear  Mr.  Edison: 

Your  recent  letters  to  me  in  refer¬ 
ence  to  watching  for  periscopes  from  a  point  near 
the  surface  of  the  water,  relating  to  smoke  pro¬ 
ducing  floats,  smoke  bombs  and  kite  rudders  are  all 
most  interesting  to  our  shipping  people. 

Your  suggestions  are  now  on  their 
way  to  England  for  the  attention  of  the  authorities 
there . 

Faithfully  yours, 


E.W. Bliss  Company 

Torpedo  Testing  Station 
Sag  Harbor, L. I. 

Sept.  13,  1917. 

Mr.  A.  M.  Kennedy, 
%  "Rampant" , 
Greenport,  N.  Y. 

My  dear  Mr.  Kennedy: - 

Vie  forwarded  to  you  today  via 
our  launoh  #11,  one  box  of  dynamite  and  one 
bundle  of  laundry  from  Red  Bank,  H.  J.,  ad¬ 
dressed  to  Mr.  Robinson.  We  have  no-one  in  our 
employe  by  this  name  and  presume  the  package 
was  intended  for  son »  one  on  your  boat  as  it 
was  addressed  oare  of  this  Company.  The  dyna¬ 
mite  oame  by  express  and  was  consigned  to  you 
in  our  oare. 

Yours  very  truly, 

Sr . 


Sept.  14,1917. 

Ur.  2.  A.  keurnoy. 

Acting  Chief  of  Bureau, 

Buroau  of  Ordnunct  , ' 
liavy  Bopartment, 

'Washington,  B.  G. 

Boar  Sir 

Your  favor  of  tlio  10th  instant  v;aa  ro- 
ceivod  and  forwarded  to  :.n.o  on  board  tho  u.  a.  ‘  . 
soohom.  On  account  of  somo  experiments  that  I 
am  making  at  sea,  I  shall  bo  u.iablo  to  go  to  Indian 

I  ha vo  be on  firing  full  size  3  inch  Oloura 
Bholla,  made  of  gas  pipe,  placing  thorn  along  a  tra¬ 
jectory  dur  to  tho  velocity  of  2800  foot  per  second 
and  a  B.ooO  yard  target.  I  find  that  both  at  17 
feet  and  4£  foot  above  tho  soa  smoke  is  offcctxvo. 

2hle  shell  was  designed  only  to  give  cargo, 
boats  some  smoko  protection,  and  -i  proposed  to  fire 
alv.ays  at  f.GOO  yards .  -  You  will  note  that  the  time 
fuse  vary  one  socond  and  still  produco  an  offoct 
smoke.  On  account  of  largo  areas  and  wind  a  number 
of  shells  will  bo  nocessary. 

Yours  vory  truly. 


tomorrow  morning.  Have  International  Paso 


f  M/  19  // 


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Ur.  William  H.  Meadowcroft, 

Edison  Laboratory, 

Orange,  N.  J.  ..statement,  .re  .ltocontiiv 

™  - 

Bear  Mr.  Meadowcroft: 

Confirming  my  telephone  conversation  with  you 
of  even  date,  we  are  very  pleaeed  to  advise  that  the  brass  tubing 
2-  0.  D.  x  1/32*  wall  has  been  completed,  and  we  shall  have  it 
ready  when  your  men  arrive  with  the  automobile. 

We  are  very  sorry,  indeed,  that  we  could  not 
Keep  our  first  promise,  but  feel  sure  that  you  will  understand 

and  appreciate  our  position. 

On  account  of  the  large  diameter  and  very 

thin  wall  this  tubing  has  sprung  out  of  round  about  9/1000.  but 
material  difference 

we  understand  that  this  will  not  make 

to  you. 

We  also  manufactured  more  than  one  hundred 

,„a  fifty  fret,  but  ..  «.  .hipplne  it  11.  »  P«  »•«* 

We  trust  we  have  not  inconvenienced  you  at  all 
by  our  inability  to  make  shipment  of  this  at  an  earlier  date,  and 
we  trust  this  ^ 

Mr.  Meadowcroft— > — 

your  requirements, 
your  oo-operation, 


September  14,1917 

With  kind  regards,  and  thanking  you  for 

Yours  very  truly, 



TtaML  CwsmxMe  Board 


11  Broadway  New  York 

Sept  .15, 1917. 

Thomas  A. Edison, Esq., 


Dear  Mr .Edison: 

In  connection  with  your  kite  experiments,  a  device 
has  been  perfected  in  England,  known  as  the  "Otter" ,  used  from  the 
bow  of  a  ship  to  prevent  destruction  by  mines.  This  "Otter"  is  a  kite, 
it  is  provided  with  some  sort  of  a  rudder  or  tail.  Mr. Sperry  has  the 
drawings.  I  have  asked  him  to  send  them  to  you. 

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ihPaiik  Roiv.  NinvYomc 

Sept.  17,  1917, 

So  the  members  of  the  Baval  Consulting  Board: 
Bear  Sirs: 

I  enclose  herewith  lists  of  the  members 
and  committees  of  the  Haval  Consulting  Board  as 
of  this  date.  Please  destroy  previous  lists. 

Very  truly  yours 

Ass't.  to  Mr.'  Robins. 


SEP  ]7  1917 


PRESIDENT .  Thomas  A.  Edison, 

VICE-PRESIDENT . . . Dr .  Peter  Cooper  Hewitt, 

CHAIRMAN . .  W.  1.  Saunders, 

SECRETARY . .  Thomas  Robins. 


LAWRENCE  ADDICKS,  126  Liberty  St.,  N.Y.City,  Tel.  Rector  3930, 

;  Res.,  3  Beechwood  PI.,  Elizabeth,  N.J.  ,  Tel.  Elizabeth  3284. 

BION  J.  ARNOLD,  105  South  LaSalle  St.,  Chicago,  Ill. 

DR'.  L.  H,  BAEKELAND,  Harmony  Park,  Yonkers,  N.Y. ,  Tel.  Yonkers  3436. 
HOWARD  E.-  COFFIN,  Aircraft  Production  Board,  Washington,  D.C. 

ALFRED  CRAVEN,  375  Park  Ave.,  Yonkers,  N.Y. 

THOMAS  A.  EDISON,  Laboratory,  W.  Orange,  N.J.  ,  Tel.  Orange  907, 

Res.,  Llewellyn  Park,  W.  Orange,  N.J. ,  Tel.  Orange  257. 

W.-!  L.  R.  EMMET,  General  Electric  Co/,  Soheneotady,  N.Y. 

DR.  P.  C.  HEWITT,  18  E.  33d  St.,  N.Y.City,  Tel.  Vanderbilt  825, 

Res.,  11  Lexington  Ave.,  N.Y.City,  Tel.  Grammercy  3205. 

A. :  M.  HUNT,  Ship  Protection  Com.  of  U.S. Shipping  Board,  Munsey 

Building,  Washington,  D.C. 

55  liberty  St.,  N.Y.City,  Tel.  Cortland  4389, 

Res.,  Bordeaux  Apartments,  549  Riverside  Drive,  N.Y.City, 

Tel.  Morningside  4960. 

UR.  M.  R.  HUTCHISON,  Edison  Laboratory,  W. Orange,  N.J. , Tel.  Orange  907, 
•J  0.  .••RaS,,  Llewellyn  Park,  W. Orange,  N.J. ,  Tel.  Orange  4710. 

B. -  G,  DAMME,  Westinghouse  Elec.  &  Mfg.  Oo. ,  East  Pittsburgh,  Pa., 

Tel.  Hiland  1582  (Bell  Telephone). 

HUDSON  MAXIM,  Maxim  Park,  landing,  N.J. ,  Tel.  Hepatoong  36, 

698  St.  Marks  Ave.,  Brooklyn,  N.Y. ,  Tel.  Bedford  2315, 

SPENCER  MILLER,  96  Liberty  St.,  N.Y.City,  Tel.  Rector  2110, 

Res.,  217  Turrell  Ave, ,  So. Orange,  H.J.,  Tel.  So.toange  771, 
PROF.'  JOS.  W.  RICHARDS,  Room  612,  Navy  Dept.  Annex,  Washington,  D.C. 

Lehigh  University,  South  Bethlehem,  Pa. 

ANDREW  L.  RIKER,  Locomobile  Co.  of  America,  Bridgeport,  Conn., 

Res.,  Fairfield,  Conn. 

THOMAS  ROBINS,  13  Park  Row,  N.Y.City,  Tel.  Cortland  8600, 

Res.,  Shippan  Point,  Stamford,  Conn.,  Tel.  Stamford  159. 

W.  L.  SAUNDERS,  11  Broadway,  N.Y.City,  Tel.  Bowling  Green  8424, 

Res.,  4  W.  40th  St.,  N.Y.Oity,  Tel.  Vanderbilt  2227. 

M.  B.  SELLERS,  801  N.  Arlington  Ave.,  Baltimore,  Md. 

ELMER  A.  SPERRY,  40  Flatbush  Ave. Ext.  ,  Brooklyn, N.Y.  ,  Tel.  Main  9700, 
•Ros.,  1505  Albemarle  Rd. ,  Brooklyn,  N.Y. ,  Tel.  Flatbush  3<b. 
FRANK  J.  SPRAGUE,  1§5  Broadway,  N.Y.City,  Tel.  Cortland  3806, 

Rea.,  241  Wes-t  End  Ave.,  N.Y.City,  Tel.  Columbus  230%. 

B.  B.  /THAYER,  42  Broadway,  N.Y.City,  Tel.  Broad  1436, 

Res.,  46  E.  79th  St.,  N.Y.City,  Tel.  Lenex  7506. 

DR.  A.  G.  WEBSTER,  Clark  University,  Worcester,  Mass. 

JR.  W.  R.  WHITNEY,  General  Electric  Co.,  Schenectady,  N.Y. 

DR.  R.  S.  WOODWARD,  Carnegie  Inst,  of  Washington,  Washington ,  D.C. 


SEP  17  1917 


AERONAUTICS.  INCLUDING  AERO  MOTORS:  Chairman,  Elmer  A.  Sperry, 

Bion  j.  Arnold,  Howard  E.  Coffin,  P.C. Hewitt,  A.L.Riker, 
M.B. Sellers,  A.G.Webster. 

AIDS  TO  NAVIGATION;  Chairman,  Elmer  A.  Sperry, 

Alfred  Craven,  A.M.Hnnt,  R. S. Woodward. . 

CHEMISTRY  AMD  PHYSIOS:  Chairman,  W.  R.  Whitney, 

Lawrence  Addicts,  L.H. Baekeland,  Jos. W. Richards, 

M.B. Sellers,  A.G.Webster,  R. 3. Woodward. 

ELECTRICITY:  Chairman,  Prank  J.  Sprague, 

lawrenoe  Addicts,  W.L.R. Emmet,  P.C. Hewitt,  B.G.Lamme, 

A. G.Webster. 

POOD  AMD  SANITATION :  Chairman,  L.  H.  Baekeland, 

Huds  on  Maxim ,  B , B . Tha  yer ,  W . R . Whitney , 

BCBL  ADD  PUEL  HANDLING :  Chairman,  Spencer  Miller, 

Lawrence  Addicks,  L.H. Baekeland,  A.M.Hunt,  Hudson  Maxim, 
Jos. W. Richards,  Thomas  Robins,  B.B. Thayer,  A.G.Webster, 
W.H. Whitney. 

INTERNAL  COMBUSTION  MOTORS:  Chairman,  Andrew  L.  Hiker, 

Howard  E.  Coffin,  M.B. Sellers,  E. A. Sperry, 

LIPE  SAVING  APPLIANCES:  Chairman,  Spencer  Miller, 

Hudson  Maxim,  Thomas  Robins. 

METALLURGY:  Chairman,  Jos.  W.  Richards, 

Lawrence  Addicks,  B.G.Lamme,  B.B. Thayer,  W.R. Whitney. 

MIMES  ADD  TORPEDOES:  Chairman,  Elmer  A.  Sperry, 

L.H. Baekeland,  M.R. Hutchison,  Hudson  Maxim, 

OPTICAL  GLASS:  Chairman,  L.  H.  Baekeland, 

Jos. W. Richards,  A.G.Webster,  W.R. Whitney. 

ORDNANCE  ADD  EXPLOSIVES:  Chairman,  Hudson  Maxim, 

L.H. Baekeland,  A.M.Hunt,  M.R. Hutchison,  Prank  J.  Sprague, 

B. B. Thayer,  A.G.Webster,  W.R. Whitney,  R.S. Woodward. 

Chairman,  Howard  E.  Coffin, 

Lawrence  Addicks,  W.L.R. Emmet,  B.G.Lamme,  Thomas  Robins , 
W.L. Saunders,  B.B. Thayer. 

PUBLIC  WORKS.  YARDS  ADD  DOCKS:  Chairman,  B.B. Thayer, 

Lawrence  Addicks,  Alfred  Craven,  A.M.Hunt,  Spencer  Miller, 
Jos. W. Richards, 

SHIP  CONSTRUCTION:  Chairman,  Prank  J.  Sprague, 

A.M.Hunt ,  'M.R. Hutchison,  Spencer  Miller,  Jos. W. Richards. 

SPECIAL  PROBLEMS:  Chairman,  B.  G.  Lamme , 

Lawrence  Addicks ,  A.M.Hunt,  M.R. Hutchison,  M.B. Sellers, 
-V^,  Prank  J. Sprague ,  A.G.Webster,  W.R. 'Whitney. 


'W.L.R.  Emmet,  B.G.Lamme^  Jos .  W .  Richax  ds ,  M.B.  Sellars, 
SUBMARINES :  Chairman,  'J.  L.H.  Emmet , 

^;M.Hunt,  M.R. Hutchison,  V/.L.Saunders ,  Prank  J.  Sprague, 
TRANSPORTATION:  Chairman,  Bion  J.  Arnold, 

H.E.Coi'fin,  Alfred  Craven,  Spencer  Millar ,, 
Thomas  Robins,  W. L. Saunders ,  B.B. Thayer. 

V7IRELE33  AND  COMMUNICATIONS:  Chairman,  P.  C.  Hewitt, 

'  1  i..G. Webster  ,  W.R. Whitney. 

Bojt.  18,1.'17 . 

LIr.  2.  A.  Kearney, 

Actinr  Chief,  .Bureau  of  03 
llavy  Department, 

hnsh'inrton,  D.  C. 

Deferring  to  my  letter  to  you  of  the  14th 
instant,  in  regard  to  tho  3-inch  oleum  shells,  1  forgo  u 
•t  mention  that  in  our  3-inch  .shells ,  made  of  gas  pipe, 
tho  Oleum  in  each  case  was  contained  In  a  separate  can 
made  of  tin  plate,  well  soldered  and  paraffined.  In 
each  case,  this  separate  can  was  loaded  into  the  gas 
pipe  shell. 


If-,- A  4?  [Cj  0 

L.-OL  <=-C  V\>-CC-uJ  y 

didU-f  Li.-ie-.'"-'.-  ‘iL-C/’-rt  j?6  H'LC 

4ct(u~,  ^Crk/-  v  o/c^ct- 



^  •  V- 'vJcscj  <tAeu 

rcrf  l  <3*yt  tfuu- 

LUC  OvO*  '  3  U^C  fv  «-  6>  - _ 

$i,^/'  <p/  jS3C.jtj.C  /Vi'aX 

l-iL  <<T~ (i-u/k  likco  i/n  cc  &£-jo&r<d< 

(L.OsY\  \WC\C^O  p 

;r . 

^  T-A  T  ^ 

^  «  ■  ’  ,  ~  ./  r 
•P^— ^  -k 

r^£fcj  <^-/<c-u^.y<  ja  »c<w  -t-L.- 






September  18,  1917. 


Recorder,  Board  on  Engineer  Troops, 

Edison  Phonograph  Company,  Orange,  N.J. 

SUBJECT:  Acoustic  Instruments  for  Mine  Warfare. 

1.  The  Board  on  Engineer  TroopB  has  before  it 
a  problem  of  supplying  instruments  for  locating  enemy 
mining  operations  by  Sound  Detectors. 

2.  Will  you  kindly  advise  us  whether  you  are  in 
a  nosition  to  take  up  (development  word?  on  acoustic  in¬ 
struments  for  this  work!  We~HEVe— some  descriptive  mat¬ 
ter  on  type  of  instruments  used  by  .the  French  and  will 
be  able  to  place  in  your  hands  the  French  instruments 
sometime  within  the  near  future. 

3.  If  you  care  to  take  up  this  development  work, 
will  you  kindly  put  us  in  communication  with  the  proper 
department  or  if  possible  arrange  for  an  interview  with 
one  of  your  representatives!  We  prefer  to  take  the  mat¬ 
ter  up  by  correspondence  and  if  necessary  arrange  t 

interview  later. 

Recorder,  Board  on  Engineer  Troops. 


Sopt.  .19,1917.  • 

Mr .  V/.  L.  Saunders , 

11  Broadway, 

Bow  York,  li.Y.  • 

'hour  i.'x.  Saunders: 

Your  favor  of  the  loth  instant  to 
Ur.  Kdison  in  regard  to  kite  experiments  was  receiver, 
and  1  cent  it  down  to  hi':  by  my  iloeBonpor. 

I  havo  juot  received  a  moMorundura  from  him 
asking  me  .to  say  to  you  that  he  know  ab  ut  the  "Otter", 
but  that  the  Kite  Kuddor  is  a  different  tiling,  and  he 
Eays  that  he  is  havinr  tho  time  of  his  lifo  to  perfect 

Yours  very  truly, 

Assistant  to  Hr.iidiuon. 






,  1917. 


the  anthracite  coal  test,  you  put  it  up  to  me  to  get  resultB 
so  that  the  merchant  jiarine  and  Navy  Department  would  have  no 
come-back  on  U3. 

The  preliminary  tests  made  on  the  PAWNEE  between 
New  York  and  Philadelphia  are  to  be  considered  as  only  pre¬ 
liminary  to  determine  the  feasibility  of  a  more  extensive  test. 

The  test  on  the  S.  S. HURON  from  New  York  to 
Charleston,  to  Jacksonville  and  return  was  a  real  teBt  and 
eminently  satisfactory.  See  report  attached. 

When  I  went  aboard  the  HURON,  to  stimulate  the 
firemen  and  engine  room  foroe,  I  offered  the  fifteen  men 
composing  the  firemen  and  engine  room  foroe  a  bonus  of  five 
dollars  each  if  the  anthracite  run  was  a  success.  This 
spurred  them  on  to  co-operation  and  effort,  the  results  of 
which  speak  for  themselves. 

I  also  promised  the  four  expert  firemen  loaned 
us  by  the  New  York  Edison  Co.  ten  dollars  each  on  the  same 
basis.  These  amounts  I  paid  out.  to  the  men  when  I  left  the 
ship  yesterday.  The  three  engineers  loaned  usby  the  Hew  York 
Edison  Company  -  one  of  them  chief  engineer  of  the  Boston 
Edison  Company,  as  Mr. Sparrow  could  not  come, .of  course,  did 
not  receive  any  bonus,  but  when  we  arrived  in  Jacksonville, 

X  hired  a  car  and  took  them  on  a  trip  to  Pablo  Beach  and  St. 
Augustine  from  Wednesday  morning  to  Friday  afternoon,  inclus¬ 
ive,  at  a  cost  of  §(52.50.  This  thy  appreciated  highly. 

I  am  enclosing  herewith  itemized  statement  of 
payments  I  have  made  out  of  my  own  pookot,  and  suggest  that 
you  0.  K.  same  for  payment  by  the  Laboratory,  as  you  can  then 
charge  it  up  to  the  Navy  Department  in  a  lump  sum. 

Inasmuch  as  the  3,  S.Co.  allowed  us  to  pay 
only  the  difference  in  cost  between  bituminous  and  anthracite 
by  giving  us  credit  for  the  amount  they  would  have  paid  out 
for  bituminous,  considerably  decreases  the  coal  cost. 

I  am  enolosing  a  bill  for  the  first  scries  of 
tests  on  the  PAWNEE  whioh  I  have  O.K'd  and  which  I  suggest  that 
you  0.  K.  in  order  that  the  Laboratory  may  send  the  Clyde 
S.  S.  Co.  check  for  $105.00. 

I  have  done  my  utmost  to  make  these  tests  a 
success,  the  tests  have  been  completed,  the  fire  room  data  is 
being  compiled  and  the  whole  data  will  be  ready  for  laying 
before  the  President,  the  Secretary  of  the  Navy,  Mr.  Hurley,  etc. 
with  a  few  days.  This  report  will  be  a  real  report. 



September  19,  l^l? 


Sept. 7  -  Taxi  to  Orange  station  and  tip  . . $  .75 

Tip  porter  taxi  to  train . 

■flare  to  Hoboken  and  Hew  York . 32 

Tip  2  porters  train  to  tube . .  .»o 

Tip  2  porters  tube  to  taxi  .  •  ““ 

Taxi  to  Hotel,  How  York  . .  1.0° 

Room  in  hotel .  "•  °° 

Dinner  . . . 

Sept.  8  -  Breakfast . . . 

Telephones . . .  ,*2? 

^axi  -  errands,  etc.  to  steamer  ...........  owe 

2  porters  taxi  to  steamer .  -5Q 

flare,  M.  R.  B.  round  trip .  59* 2? 

Andrews,  of  N  Y  Edison  Co.  Ditto .  30.00 

Reinioker,  of  H  Y  Edison  Co.  Ditto  ........  30.00 

Riokets,  of  H  Y  Edison  Co.  Ditto .  30.00 

Quinn,  of  N  Y  Edison  Co.  Ditto  .  30*22 

Gannon,  of  H  Y  Edison  Co.  Ditto  .  30.00 

Rice,  of  N  Y  Edison  Co.  Ditto  .  30*°° 

Grant,  of  N  Y  Edison  Co.  Ditto  . .  32*22 

Sept.  10  -Telegrams  from  Charleston  . .  ton 

Supper  Charleston . 

Taxi  Charleston, . •  •• .  ~*i” 

Sept. 12  -Taxi  Steamer  to  Hotel,  Jacksonville  . .  1.35 

Tip  to  porters  on  doolc,  self  and  party  ....  2.25 

Tip  to  porters  at  hotel,  self  and  party  ....  1.75 

Breakfast . 

Lunch . 

Dinner . .  3  on 

Room  at  Hotel . . 

Tips  at  hotel . j»*ig 

Supt.  13-Breakfast . 

2inner . * . !  5.00 

Tips  . . I'll 

Sept,  14-Breakfast  . . or 

Lunch . I'll 

Tips  to  porterB,  hotel  and  dook  ............  1.75 

Hotel  aooom.  Edison  fireman  in  Jacksonville. 12. 00 

Meals,  Ditto  . . 

Carfare  and  incidentals . . 

TIP»  P.W  b,  th« . »M  w  ,, 


Forward .  #  358.22 

Sept.  18  4  Paid  to  ship' a  engine  room  and  fireroom 

foroe  for  bonus  as  promisee,  15  men  at 

five  dollars . . .  75.00 

Paid. to  4  Edison  Co.  firemen  as  bonus 
as  promised,  4  men  at  10.00  40000 

5  steamer  chairs  South  .  5.00 

3  steamer  chairs  North . . .  3.00 

Miscellaneous  expenses  aboard  ship, 

tipB  etc.  for  self  and  party .  46.30 

Rent  of  auto  Jacksonville . . .  62550 

Total .  8590. 


Sept.  SO, 1917. 

AnsiRii  Bicliford  Oo., 
sinsbury,  Conn. 


Attention  Ur.  Pat-linn : 

^his  'iE  to  confirm’ the  telephone  request  tx-M 
to  you  this  afternoon  in  behalf  of  Ur.  Edison  for  come 
cample  lenrths  of  waterproof  faces,  namely.  ■ 

Pour  10-foot  burn  1ft.  in  IS  a 

n  10-foot  .  ”  •  "  "  ^  „  r'r  ' 

"  10-foot  ”  "  "  111 

A  a  l  explained  to  you  over  the. 
aro  for  como  apobial  experiments  fitet-iEr.  Miaon  n-‘-in' 
for  our  Government,  and  it  is  very  desirable  for  l.xn  to 
have  the  name  at  as  early  a  data  as  possible. 

I  'am  euro  that  he  will  appreciate  very  wxeh 
your  nromnt  and  courtoous  offer  to  maho  up  <-,/ v 

lengths  of  fuses  and  have  them  ready  by  Load or.  -uo. 
and  I  wish  to  than!:  you  in  his  bo-itlf. 

■After  cloclnr  our  telophono  oonvcroatxon,  1  li-.o 

l='VSlr-So“A  .'“-.SS  SgTUi 

and  I  shall  bo  oblirod  if  you  wx. 1  hindly  ■•“o3 opaono  mo 
that  X  rax;-  sond  ny  raotsonRor  to  simobury. 

1  urn  oleusbd  to  renew  my  upeuaintanoo  with  tho 
son  of  my  Rroat'ly  ostoemod  friend  Henry  Jarlinp,  -nd 
.  with  cordial  personal  rorarck ,  I  romain, 

-  /Xoure  very  truly. 

Assistant  to  Ur.  Edison. 


ifU.  2  0,  Ujt'J 

critics  Ct  .  fe Cc<}(nL 

U  .  S.  S,  ScccLict  iL.  S  C  fCj  2- 

»i*J  Uu 

tV  lAC-  idCLtj<t  i ^ 

,dT!ce.  (.tst.CC  .  ^c.  cim-tn  l. 


i/ou.t'i  YlA.c-  6t<^(  /o  rff-r' 

/().[{•  })  icce^cv^L-tr^/ 

Dr.  M.  R.  Hutchison, 

Edison  laboratory, 

Orange,  New  Jersey. 

Submarine  Defence  Assn. 

Dear  Dr.  Hutchison: 

I  was  glad  to  get  your  telephone  message 
in  reference  to  the  results  of  the  anthracite  test  on 
the  S.S.1  Huron  from  Jacksonville  to  New  York  and  hope 
that  as  soon  as  you  can  you  will  let  me  see  a  copy  of 
the  report.  It  is  evident  that  the  clearing  up  of 
misconceptions  is  an  important  part  in  the  development 
of  the  art  of  fighting  the  submarine  and  I  think  these 
demonstrations  as  to  the  availability  of  anthracite  are 
of  the  utmost  utility. 

Faithfully  yours, 



147NY  H  44  , 

GREENPORT  NY  1235  PM  SEPT  22-17 


send  goll  engineer  of  moving  picture  DIVISION  TO  GREENPORT  SUNDAY 







Sept.  £4,  1917. 

Mr .  Edison:  * 

l.lx.  Bennett  of  the  International  .i*use  .and  -arras  Co. 
sent  over  thoso  twelve  spocial  fusoc  for  you  thi3  morning.  Ho 
explained  about  the  working  of  them,  and  1  will  specify  the  points 
he  pave  me. 

If  you  will  pick  up  ono  of  those  fuses  you  will  see 
on  the  lower  ring  a  scale  of  figures  from  0  to  22.  She  numbers 
represent  the  seconds,  that  is  to  s'- 
at  1,2,3  and  i 

>  to  22  seconds. 

this  fuse  is  for  going, off 

Vo  the  right  of. the  figure  22  you  will  seo  a  rod  cross 
and  on  the  ring  immediately  ubovo  1  (which  is  the  middle  ring J 
there  is  a  straight  murk  which  is  directly  in  line  with  the  rod 
cross.  ‘fhes e  fuses  are  all  set  this  .ay  and  when  tnus  sot  are 

at  a  point  of  safety. 

If  you  want  to  set  the  fuse  to  go  off -in  any  particu-v 
lor  number  of  soconds,  take  the  wrench  wnicli  is  sent  herewith  and 
turn  the  mark  on  the  middle  ring  to  the  number  of  seconds  tuned. 
Vou  will  see  that  there  is  a  little  projecting  nib  on  the  second 
ring  which  fits  in  a  corresponding  place  in  the  wrench,  rou  can 
turn  the  middlo  ring  either  to  the  right  or  left. 

She  mark  which  is  to  stand  in  line  with  the  number  of 
■  i -jinn  mark  which  now  stands,  in  perpendicular  line 

Vheso  fuses  are  to  go  off  at  the  specifier  number 
of  seconds  when  the  Barometer  stands  at  30.  Xf  to 
abovc  50,  a  plus  correction  should  be  made,  and  if  below,  a  minus 
correction.  If  you  need  it  as  close,  as  that  they  can  supply 
you  with  the  tublos. 

Vho  firing  pin  is  in  the  upper  part  under  the  while 
mo  o  1  cap*  xlio  norcu&siozL  primer  ie  under  this  cup,  nna  rocut* 
in  a  little  brass' stirrup.  Under  ordinary  gun  pressures  a 
momentum  of  the  projectile  is  grout  enough  to  cause  such  a  pross- 
u-g  shat  ’the  ercustion  .  up  straightens  -out  and  the  ; orcuasxun 
III  comes  with  sufficient  force  upon  the  little  firing,  pin  below 
that  the  fuse  functions.. 

If  you  have  not  a  groat  mu: ale  velocity,  and  find 
that  your  first  shell  does  not  explode  as  it  should  through  fail- 
uro  of  the  fuse,  the  white  motul  cap  should  be  taken  off  and  the 
stirrup  taken  out.  Which  will  allow  of  the  ercussion  primer  to 
bo  in  direct  contact  with  tho  pin,  and  then  at  the  noxt  shoe 
fuse  should  function. 

So  take  the  white  cap  off  soraue  out  the  grease  in  tho 
side  hole  and, unscrew  tho  screw.  She  mosoongor  forgot  to  bring 
the . little  2-prongofl  wrench  which  fits  in  tho  two  holos  in  t_e 
top, and  which  is  used  to  unscrew  this  cap. 

Ho  therefore  unscrewed  the  _s crew  in '  tho  lower  part  of  the  white, 
.aetul  can,  hut  did  not  take  the  screw  nil  tho  way  out;  and  rave 
it  n  little  tnu  with  tho  wrench,  which  etartod  tho  unscrew lnr  of 
tl>e  can,  and  he  thon  took  tho  cap  off  with  his  finpers. 

Soot.  £5,101 

'..JBJKC'j;  -  Aoouotlc  IiiBtruinonte  for 
.  .ino  ..arft-ro. 

Capt.  1.  b.  how oil, order,  Board  on  Enpineor  Yroops,. 

1419  i1  Street,  Iiorthwcst, 

V.aahinpto.n,  1).  C. 

Dear  air 

V.o  have  received  your  favor  of  the  10th 
instant  in  re  ard~  to  tho  matter  of  taking  up  sono 
development  work  on  acoustic  instruments  for  locatinp 
enemy  min Inn  operations  by  Sound  .Detectors. 

'we  repo  at  to  sa;  that  vro  shall,  be  unable 
to  be  of  assistance  to  you,  but  would  sucpopt  that 
you  writo  to  .ir.  Ehonno  n.  Edison  porconc .ly-at  Oranro, 
iS.j.  Tie  is  doinr  some  special  work  for  tho  Govnin- 
nont  and  nay  bo  able  to  bo  of  assistance. 

Yours  very  truly, 

.  '  ikiJEAS  A.  EDISuiJ,  IifC • 

fm  iMSS«il«-BMSCFOMP  0^1 

Ensign-Bickford  &  Climax 

Sims; b  ury;  Cohn,, 

Sept.  25,  1917. 

Mr.  Win.  H.  Meadowcrof t ,  Assistant, 
Mr.  Thomas  A.  Edison, 

Orange,  H.  J. 

>'1si  “  «»' 

,v>  -P-' 




Dear  Sir 
We  i 


;£  r°  V‘  1 

sending  via  your  messenger  six  50  ft.  coils  of  Safety . 

r  A‘  u  fP 


As  we  explained  to  you  oyer  the  'phone,  we  were  unahle  to  make 
any  fuse  which  would  burn  in  10  ft.  lengths  at  the  rate  of  15  sec. 
per  ft.,  as  we  had  no  powder  at  our  works  which  was  fast  enough. 

If  you  desire  this  made  up,  we  could,  however,  get  some;  but  as  we 
advised  you,  this  fuse  would  be  apt  to  snap  and  pop  if  made  up  in 
the  regular  way  on  account  of  the  fast  burning  speed. 

The  six  50  ft.  samples  which  we  are  sending  we  have  tagged, 
putting  tke  brand  of  the  fuse  and  the  kind  of  powder  used  in  each 
and  also  the  average  burning  speed  for  10  ft.  lengths  and  1  ft. 
lengths.  You  will  note  that  in  every  case  a  10  ft.  length  of  the 
same  fuse  containing  the  same  powder  will  burn  at  a  faster  rate  per 
ft.  than  a  single  ft.  of  the  same  fuse. 

In  your  letter  you  did  not  state  whether  you  wanted  the  result 
of  the  burning  speeds  for  1  ft.  lengths  or  10  ft.  lengths;  but  from 
our  second  telephone  conversation  with  you,  we  understood  that  you 

thought  the  10  ft.  length  burning  speeds  were  what  you  desired. 

Of  course,  these  are  average  burning  speeds,  and  in  the  case  of 
a  10  ft.  length,  two  pieces  might  burn  with  a  variation  of  10 
seconds  from  the  average;  whereas  in  the  case  of  1  ft.  lengths, 
they  would  not  probably  vary  more  than  l£  seconds.  If  very  accu¬ 
rate  burning  speeds  are  what  you  desire,  we  could  by  using  special¬ 
ly  treated  cotton  yarns  for  spinning  the  fuse,  obtain  a  more  uni¬ 
form  rate  than  these  samples  which  we  are  submitting. 

After  trying  out  these  samples,  however,  you  can  let  us  know 
further  your  needs  in  the  matter;  and  we  will  do  everything  possi¬ 
ble  to  comply  with  them. 

Item.  €«siming  Board 


Sept.  35,  1917. 

To  the  Members  of  the  Naval  Consulting  Board, 

Dear  Sirs: . 

Aspeoial  meeting  of  the  Board  will  be  held  at  the 
office  of  w’.  L.  Saunders,  Chairman ,11  Broadnay,  Neu  York, 

on  Thursday,  Sept.  27,  at  10:30  A.U. 

The  purpose  of  this  meeting  is  to  enable  the  Board 

„  seasides  sad  act  upon  a  repeat  .Mod  rill  »  “a 

which  deals  with  the  baaaiag  of  aathaacite  coal  o»  .t.m.hlp.. 

Very  truly  yours, 



Mr.  Edison: 

I  am  sending  you  this  memorandum^ 

Cobalt  Blue.  I  took  up  the  matter  -with  the  lj&  .  _ 

Devoe  &  Co.,  and  he  said  that  Smalts  is  now  a  term  for 
a  course  colored  material  which  is  produced  chemically, 
and  is  used  by  sign  painters  as  a  sanding  back-ground 
for  signs.  It  is  made  in  various  colors,  but  the  blue 
is  not  a  Cobalt  Blue,  and  Cobalt  does  not  enter  into  it. 

He  said  that  what  was  formerly  known  a  few  years 
ago  as  Smalts  was  made  in  Germany  and  was  made  from  Cobalt 
Oxide.  It  is  very  scarce,  and  in  fact,  is  no V  practicably 
not  obtainable. 

He  promised  to  look  into  the  matter  right  away 
and  later  on  called  me  up  and  said  that  Eeuchtwanjer  &  Co. 
oould  let  him  have  one  pound  of  the  real  stuff,  but  it 
would  not  be  ready  until  Erl day  of  this  week.  I  will  send 
to  liew  'iork  for  it  on  Friday  and  then  send  it  to  you. 

In  the  meantime,  I  sent  you  some  Cobalt  Oxide 
that  Louie  Ott  had  in  the  Stock  Hoom. 


C#L*JUr  \ 

r^t-)  t—  T 

ij  1  — * 

^cjs^U"^'^JU  ^ 

7  llM^<  &*'M‘  ~~ 

0,  0. 


dbdr  2-  A 

JAa^-g-  L&fLJi*-'  dt<JLjx6ic(£l‘ 
&>ctsxi^Tc*  r* 

fu^  ktJc  ~Z-^‘- 

l.iX.  <£L — - 

tl/2.£&»  ".x-IA  ^  A 

^JL  t+'-f^zr 

'  7  ,(4” 


(jffirite*' ( 
jLfc-  m-  • 

^Wm  rr;A\ 

'  vHc-V'/Vf 

TtaML,  Cwsmiif©  Board 



i:i  park  Wow,  New  York 
Sept.  36,  1917. 

Hr.  W.  H.  Meadowcroft, 

Edison  Laboratory, 

Orange,  H.  J. 

Dear  Hr.  Headoworoft: 

About  a  week  ago  a  story  appeared  in  the 
Hew  York  Tribune  in  which  the  irregular  behavior  of  a  torpedo 
was  attributed  to  an  invention  of  Mr.  Edison* s.  According  to 
the  dispatch,  which  oame  from  a  Washington  correspondent,  Mr. 
Edison  had  invented  a  device  which  was  designed  to  deflect  a 
torpedo  upon  its  approaoh  to  a  ship.  I  knew,  of  course,  that 
Mr  Edison  had  invented  nothing  of  that  kind,  and  in  order  to 
kill  the  matter  my  statement  to  all  the  newspapers  who  called 
or  telephoned  was  as  .follows: 

"Insofar  as  I  know  there  is  no  truth  in 
the  story  concerning  Mr.  Edison' which  was  printed 
in  this  morning* s  Tribune." 

A  few  days  later  in  a  dispatch  from  Cleveland  Charles 
Edison  was  quoted  as  saying  that  his  father  was  engaged  in 
experiments  "aboard  a  yacht  off  the  coast  working  upon  inven¬ 
tions,  some  of  whioh  are  really  revolutionary  in  «ieir  newness". 
This  statement  is  quoted  by  the  Tribune  as  a  vindication  of 
its  earlier  story,  which  means  that  if  the  Tribune  believes 
that  it  is  telling  the  truth  it  must  believe  that  I  was  doing 
otherwise  in  denying  the  truth  of  the  Tribune  s  original  state¬ 
ment.  In  fact,  I  am  told  that  they  published  an  article  on 
Sunday  in  which  it  was  stated  that  the  Tribune  saw  no  reason 
to  doubt  the  truth  of  its  first  statement  concerning  Mr. 
Edison's  invention  to  thwart  the  torpedo.  Without  knowing  the 
exaot  words  used  it  is  evident  that  my  denial  has  been  dis¬ 

I  should,  of  course,  be  very  sorry  if  you  were  to  use 
this  letter  in  any  way  which  might  make  trouble  between  Charles 
Edison  and  his  father,  but  if  you  find  an  opportunity  to 
intimate  to  the  young  man  that  such  statements  as  his  axe 
likely  to  place  other  people  in  embarrassing  positions  it  might 
'  i  do  no  harm. 

Ur.  Meadowcroft 

Sept.  26,1917. 

I  have  realized  fully  the  of^alling^ttentioa 

to  Mr.  Edison' a  work  or  ^S.^ef’^ght  he  revlaled  hut  that 
the  exact  nature  of  his  activities  S  crank.  Therefore 

he  might  suffer  at  the  ^£^°fha°  been  somewhat  of  a  shock  to 
the  persistence  ox  the  TriDune  little  to  he  desired  in  the 

me.  Usually  that  paper  JewMOT  ^  ^  &nxlety  which  Mrs. 
way  of  loyalty.  I  hav  ®°  d  hut  now  I  fear  that  the 

Edison  always  feels  for^er^hush^e  by  the  Journal  end 

w  *Mre  1,111  be  *°” 

necret  service.  Z/:/ 

Yours  sincere!}^ 

■  ■ 

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U.S.S.  SACHEM,  S.P.  192 

Greenport,  j,.I. 

September  22,  1517. 

Mr.  V/.H.  Meadowcroft, 

Edison  laboratory, 
Orange,  H.J. 

Dear  Sir: 

I  have  been  requested  to  forward  you  the  following  list 
of  records  selected  by  the  Mu3ic  Committee;  if  you  will  send 
these  down  at  your  earliest  convenience  they  will  be  appreciated 
by  one  and  all: 










































2574  3092  28155 

2598  A^095  'V28185 

*2617  3JJ14  28136 

*•2679  3121  28193 

26*80  3129  28198 

2738  3133  28144 

2787  3149.^  28203 

2804  23095"  28211 

2835  -23-1-1-t*'''  28216 

2867  — 83±W  28207 

2886  23117  28220 

2945  23201  28200 

2956  23171  28206 

2965  23163  28236 

2969  -881'Ors’'  28246 

2979  ’•28-102'?"  28256 

3014  - 28103 S  28261 

3026  r28107^  28286>^ 

3065  +28142  2639 

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W  H  meadowcroft 




oiftf  osrnoN - 


Naval  Consulting  Board,  of  the  United  States, 

Orange,  N.  J. 


1.  Upon  my  return  from  the  Naval  Consulting  Board  meeting  at 
Washington  Saturday,  I  immediately  Began  preparation  of  the  report 
of  the  anthracite  coal  test.  I  spent  all  day  Monday  and  Tuesday  so 
engaged  in  connection  with  Mr.  Sparrow  and  his  staff.  Tuesday 
evening  I  had  to  leave  for  Washington  to  attend  a  test  of  the  oleum 
Bomb  referred  to  in  separate  report.  Yesterday,  Thursday,  a 
special  meeting  of  the  Naval  Consulting  Board  was  called  at  Mr. 
Saunders'  office,  to  hear  the  report  and  act  thereon.  There  were 

Messrs.  Saunders,  Thayer,  Whitney,  Hewitt,  Hiker, 

Arnold,  Sprague,  J.  P.  Sparrow,  Chief  Engineer  of 

the  New  Yolk  Edison  Co.,  and  myself. 

2.  The  following  resoltuion  was  drafted  and  forwarded  to  the 
Secretary  of  the  Navy,  to  be  followed  by  a  copy  of  the  formal  report: 

"The  Naval  Consulting  Board,  at  a  meeting  held  in  New  York 
on  Thursday,  September  27,  1917,  hereby  endorses  the  report  and 
conclusions  drawn  from  tests  on  the  Clyde/  S.  S.  HURON  from  New 
York  to  Jacksonville  by  way  of  Charleston  and  return,  made  September 
8th  to  19th,  1917,  this  report  being  signed  by 

J.  E.  Sparrow,  Chief  Engineer,  New  York  Edison  Company 
J.  D.  Andrew,  Chief  Engineer  Power  Plants,  Boston  Edison  Co. 

N.  J.  Reinicker,  Assistant  Chief  Engineer,  N  Y  Edison  Co. 

E.  B.  Ricketts,  Engineer  of  Tests,  New  York  Edison  Co.  Power  plante 
Wm.  P,  McGuire,  Personal  Representative  of  E.  N.  Hurley, 

M.  B.  Hutchison,  Naval  Consulting  Board. 

"In  our  judgment  itiis  feasible  and  practicable  to  burn 
anthracite  coal  of  qualities  which  can  be  scoured  in  the  open  market, 
in  Scotch  Marine  Boiler  furnaces  equipped  withgrates  designed  for 
burning  ordinary  soft  coal,  without  reduction  of  steaming  capacity 
of  such  boilers  below  that  obtained  with  soft  coal,  and  without 
producing  smoke,  when  there  is  available  a  total  draft  equivalent 
of  one  inch  of  water,  this  maximum  draft  pressure  being  sufficient 
to  burn  pea  sized  coal  or  larger. 

"The  Naval  Consulting  Board  expresses  the  opinion  that  no 
device  for  producing  smokeless  combustion  with  soft  coal  for  merchant 


ships  when  passing  through  the  Sanger  Zone  Bhould  he  considered, 
satisfactory  which  has  to  rely  upon  the  human  element  for  its 
control  and  operation." 

3.  The  last  paragraph  refers  to  automatic  devices  such  as  auto¬ 
matic  stokers  said  to  produce  smokeless  combustiog.  of  soft  coal,  a 
great  many  of  which  have  been  advanced  for  this'Jon  merchant  ships. 

4.  One  hundred  copies  of  the  report  will  he  made  and  distri¬ 
buted  to  the  various  officials  of  the  U.  S.  and  Allied  Navies,  the 
Shipping  Board,  etc.  It  is  considered  of  major  importance,  and  the 
solution  of  the  problem,  in  addition  to  being  a  complete  refutation 
of  the  claims  made  by  certain  merchant  marine  companies  and  Chief 
Constructor  and  Chief  of  Bureau  of  Steam  Engineering  of  the  TJ.  S. 
Navy,  etc. 


ir,  Thomas  A.  Edison,  President,  y 
Naval  Consulting  Boatd  o f/\ 
Orange,  N.  4.  / 

1.  On  September  26th,  at  7.15  a.  m.  ,  x  arriveu 
Washington  for  the  purpose  of  attending  a  test  of  the  oleum  homh 
at  Indian  Head. 

2.  We  departed  from  the  Washington  Navy  ?ard  at  9.45 
a.  m.  on  the  TJ.  S.  S.  STLPH. 

3.  There  were  present 

Rear  Admiral  Ingersoll,  Bureau  of  Ordnance 
Rear  Admiral  Couden  of  the  Shipping  Board 
Captain  Brown,  Prof.  Mathematics  Bureau  of  Ordnance 
Cant.  William  Strother  Smith,  Naval  Consulting 
*  Board,  and 


4  Details  of  the  construction  of  the  bomb  were  not 

immediately  available  as  only  a  rough  sketch  “^et“Pme0r 

machine  shop  use.  A  copy  of  this  sketch  will  be  forwarded 
together  with  detailed  data  within  a  day  or  two. 

5  The  bomb  was  made  up  to  fit  the  standard  5"  naval 

as  rjkif  i3f 

in  and  made  tight. 

6  As  equipped,  the  shell  was  intended  to  go  oft  upon 

ss-ssajs  rsia:  SrEsISS  st 

It  was  fitted  with  a  band  for  -rotating  it  when  fired  fro  S 

7.  A  motion  picture  camera  was  mounted  °n  ? 

arssrc.'sas  £».* »  ss'-asar-. 

launch  was  in- shore. 


TBST  MO.  1. 

4000  yards.  Muzzle  velocity  2300  foot 
seconds.  We  traced  the  shell  from  the  time  it  left  the  gun  until 
it  hit  the  water  midway  between  the  launch  and  the  SYLPH,  because, 
in  some  way, the  firing  of  the  shell  produced  a  leak  and  the  oleum 
trailed  behind,  resembling  a  dense  black  smoke.  The  whell  exploded 
on  contact  with  the  water.  The  smoke  produced  by  the  TNT  exploding 
and  the  sound  of  the  explosion  denoted  perfect  detonation.  The 
splash  was  Cow,-»n»,t.T«iv  ~ti  size  and  speed  of  the  shell. 

There  was  very  little  oleum  fog  produced. 

9.  TEST  NO.  2 

We  approached  Indian  Head  1000  yards,  the  ■ww/t 
being  then  3000  yards.  The  5"  gun  dropped  the  shell  midway  between  t 
the  launch  and  ourselves.  This  time  there  was  very  little  leakage 
of  oleum.  Thh  splash  was  higher,  owing  to  the  high  velocity  of  the 
shell  when  the  water.  Perfect  detonation  on  instant  of 

impact.  A  slightly  greater  oleum  fog  was  produced  by  this  shell 
but  it  was  not  at  all  effective,  in  fact  apparently  insignificant. 

10.  TEST  NO.  3 

We  moved  up  to  a  distance  of  2000  yard3  of  the  gun. 

A  larger  splash.  Perfect  detonation  upon  impact  with  the  water. 

Oleum  fog  only  slightly  greater  than  No.  2.  There  was  very  little 
if  any  leakage  of  the  oleum  from  this  shell  in  flight. 

11.  TEST  HO.  4 

We  then  went  up  the  river  and  hove  to  about  750  yards 
from  the  old  U.  3.3.  TERROR,  an  obsolete  monitor.  We  -were  on  her 
port  side.  A  6"  shell  filled  with  about  two  liters  of  oleum  was 
suspended  from  a  small  crane  17  feet  from  the  water  and  fired 
electrically  by  the  same  size  detonator  used  in  the  previous  experi¬ 
ment.  Pieces  of  the  shell  fell  within  thirty  yards  of  our  vessel 
and  were  very  widely  dispersed.  The  cloud  produced  was  about  60  ft. 
high  and  200  ifeet  long.  The  eight-mile  per  hour  wind  blowing  up  the 
river  wafted It  was  fairly  effective  for  about  fofttxseconds, 
although  we  could  see  the  shore  line  at  all  times  and  *fc  deemed  to 
be  about  four  times  as  dense  toward  the  top  as  it  was  near  the 

12.  TEST  NO.  5 

6"  shell  containing  four  pounds  of  black  powder  and 
no  oleum.  Pi  red  from  the  same  crane  17  feet  above  the  water.  Much 
lighter  cloud  which  rose  rapidly  and  not  at  all  effective. 


13.  I  am  enclosing  some  motion  picture  photographs  which 
were  made  of  tests  made  at  Indian  Head  previous  to  our  visit,  the 
titles  on  each  of  which  explain  them.  I  have  arranged  them  in  order 
in  which  the  phtographs  were  taken.  The  "Test  No.  2"  was  produced 
by  suspending  the  6^'  .  shell  composed  of  red  phosphorous  and  parafine. 

-Olitrt.  was  0.65  lbs  of  TNT^aboW  two  feet  under  water  the  depth  at  which 
they  figured  the  shell  proceeds  before  the  detonator  can  act. 

14.  Test  No.  3  shows  the  result  of  the  6"  shell  having 
one  liter  of  oleum  and  0.65  lbs  of  TNT,  the  shell  being  suspended 
just  above  the  surface  of  the  water. 

15.  I  cannot  quite  make  out  the  continuity  of  the 
exposures  from  this  $oint  on,  but  perhaps  by  referring  to  the 
title  on  each  you  can  do  so.  The  commanding  officer  of  Indian  Head 
promised  to  send  me  details  of  the  tests  he  had  previously  con¬ 
ducted  and  I  will  transmit  these  to  you  as  soon  as  I  receive  them. 

16.  It  is  the  concensus  of  opinion  of  the  Officers  at 
Indian  Head  that  much  better  results  are  achieved  when  the  bomb  is 
allowed  to  rest  on  a  float  on  the  surface  of  the  water  and  that 
minimum  results  are  achieved  by  firing  the  bomb  from  a  gun.  They 
attribute  the  absence  of  fog  to  the  vaporization  of  the  water  by 
the  impact  of  the  shell  when  striking  the  water  by  the  violent 
project#®*,  of  the  vaporized  oleum  against  this  wall  of  spray,  result¬ 
ing  in  absorption  of  the  oleum  by  water  spray.  They  also  think  that 
when  the  bomb  explodes  in  the  hole  which  it  knocks  in  the  surface  of 
the  water  all  the  oleum  projected  from  the  shell  against  the  wall 

of  water  is  forced  violently  into  the  water  and  does  not  emerge 

17.  I  understand  they  expect  to  continue  the  experiment 
and  promised  to  furnish  further  details  as  determined. 

18.  The  Commanding  Officer  of  the  Indian  Head  Proving 
Ground  is  a  young  man  full  of  ginger  and  is  anxious  to  accomplish 
results  with  this  bomb  as  any  man  I  have  seen. 




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Washington,  D.  C. 

28th  September,  1917. 

Sear  Mr*  Edison; 

Commodore  Gaunt  has  gone  on  a  short  visit  to 
England  or  1  am  sure  he  would  have  written  you  personally. 
Commander  Tremayne,  R.N.,  and  Lieut.  Commander  Cheston, 
have  today  been  here  and  shonn  me  the  photos  of  all  the 
inventions  whioh  you  have  so  kindly  plaoed  in  their  hands, 
and  of  whioh  they  have  handed  me  reports  for  transmission 
to  the  Admiralty.  X  am  sure  that  at  a  later  period  you 
will  receive  the.  personal  thanks  of  the  Admiralty  for 
your  great  kindness  in  granting  them  the  opportunity  of 
examining  your  inventions  with  a  view  to  their  ultimate 
use.  In  the  meantime,  may  I  tender  my  sincere  thanks 
for  your  courtesy,  kindness,  and  assistance. 

Tours  sincerely. 

Navail  CoarsinaiNG  Board 



1:1  park  llow,  New  York 

Sept.  38,  1517. 

To  the  lie  Gibers  of  the  Naval  Consulting  Board: 
Bear  Sirs: 

Please  he  advised  that  the  next 
meeting  of  the  Board  will  he  held  at  the 
Carnegie  Institution,  Washington,  on  Saturday 
October  6th,  1517.  In  accordance  with  the 
custom  of  the  Board,  the  informal  meeting  begins 
at  nine  A  .11.  and  the  formal  meeting  at  ten. 

Very  truly  yours, 

Thomas  Robins, 
-By  f.C-J.. 


Mr.  Geo..  ?.  Morrison,  .  '  - 

Vico-President,  General  Eleotric  Co.,' 
Harrison,  lien  Jersey: 

Dear  Hr . '  Morrison : 

Mr.  Edison  is  on  board  the  "U.S.S. 
Sachem,  S.  ?,  192",  and  makes  his  headquarters  at 
Greenport,  Long  Island.  He  -is  usually,  at  sea  all 
day  and  comos  in  at  night.  He  do.os  not  nocosssrily 
come  ashore,  but  he,  has  a  nunbor  of  men  down  there. 
V.hen  Mr.  Stickney  goes  down,  he  had  bettor  go  to  the 
Groonport  house ,  which  is  a  little  Hotel  at  Grocnport, 
and  ask  for  Hr.  J.  C.Choeler,  who  boards  at  the 
Hotel.  Hr .  Cheslor  is  working  on  another  bout,  the 
yacht  "Rampant" ,  which  is  also  located  at  Greonport, 
and  ho  will  arrango  for  Mr.  Stickney  to  see  Hr .Edison. 

‘I  think  it  would  bo  well  for  you  or  Hr. 
Stickney  to  let  me  know  when  he  i-s  ready  to  go  down 
and  I  will  send  a  wire  to  H-r .  ChoBler  to  look  out  for 

Groonport  is  roached  on  the  Long  Island 'Kail-,  starting  from  .tho  Pennsylvania  Station  at  33d 
Streot,  Hew  York  City.  fhere  are  very  few. trains, 
flier  o  is  one  leaves  How  York  at  6:34  in  tho  morning, 
arrives  at..  Groonport  12  Hoon.  2he  next  leaves  Pennsyl¬ 
vania  Station  at  10:07  and  pots  down  to  Greonport 
at  1:27  P.1.1.  She  next  train,,  oxcopt  on  Saturdays, 
leaves  Permsylvnnia  Station  at  4:0b  P.ii.  and  gets  to 
Groonport  at  6:34  P.Li.  fills  is  .the  train  lhat  we 
usually  tako  on- account  of  Mr.  Edison  only  .coming  in 
at  nights. 

Yours  vory  truly. 

Assistant  to  lir.  Edison. 

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back  hereof,  which  are  hereby  agreed  to 

105  "YR  26 

.  .  GR EP'PORT  MY  11  am  SEPT  29 

w  n  m  eadov/croft  • 

EDI  $0M  LABORATORY  0Ra*'GE  .’’J 

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12  03PM 

M.J*  F  __ 
at  7  hjs_. 


Naval  Consulting  Board 
and  Related  Wartime  Research  Papers 
October  1917 

Qotdsbor  1,1917. 

Hr.  Thomas  P.obins,'  . 

13  Park  How, 

Ilet?  York,.  li.Y.  ' 

Dear  hr.  hohins : 

I  received  your  .favor  of  the  26th 
ultimo  in  rcrarcT  to  tho  interview:  of  Charles  Edison 
v;h ich  appeared  in  one  of  the  Cleveland  papers.  Charles 
has  boon  away  and  I  did  not  have  opportunity  to  dis¬ 
cuss  tho  mattor  with  him  sooner.  , 

Ho  cays  that  thoro  was  a  great  deal  more 
in  tho  interview  than  he  really  said.  The  only  state¬ 
ment  that  ho  raado  was  to  tho  effect  that  there  was 
nothing  spectacular  in  what  Hr.  Edison  was-  doing,  but 
that  it  was  only  in  the  line  off  development. 

Charles  fttrthor  says  that  the  heporter  already 
know  that  his  father  was  in  a  boat  sonowhore  off  tho 
coast.  Othorwiso,  ho  would  never  have  mentioned  it. 

He  has  come  to  tho  conclusion  that  he  will  have  nothing 
to  say  on  the. subject  heroafter. 

Of  conreo,  I  am  not  eoing  to  call  IJr.-ffiBCmas  n. 
Edison’s  attention  to  tho  natter  as  it  might  tond  to  dis¬ 
turb  him  and  would  not  accomplish  any  G00(i  boyond  what 
has.  alr.eady  boon  dono. 

Yours  very  truly,  • 

Assistant  to  Hr.  Edison.  ' 

P.2.  'I  am  enclosing  twp  lottors  which  Hr.  Edison 
has  requested  mo  to  rofer  to  you,  ono  from  The  Emerson 
Company,  and  tho  other  tho  h,cieral  Company  of  America. 

A/ 3971 . 

October  2,  1917* 

With,  reference  to  your  call  of  yesterday, 
regarding  Lieut.  O.H.  Varley,  R.N. ,  this  officer 
is  over  here  to  take  command  of  the  submarines 
returning  to  England  and  anything  you  oan  do  for 

him  will  be  appreciated. 

Commander  R.N. 
Assistant  Naval  Attache 

William  H.  Meadowcroft,  Esq., 
Edison  laboratory.  Orange, N.J. 

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(Ska.  IBAfei 

October  S,  1917. 

Mr.  Edison: 

I  must  ask  you  to  please  excuse  me  for  neglecting  to  send 
you  yesterday?  the  angers  to  the  first^o  auestions^o^^he  memoran- 

been^concentrating  my  attention  on  |e^ting  you  the  other 

X  quote  your  question  from  your  memorandum  -  "On  the  jSnglisn 
„  t  v  ^150  miles  from  Irish  or  Scottish  Coasts,  or  cOO  miles  west 
of  Sicilv  Islands,  does  the  spray  from  the  sea  freeze  on  the  cabins 

Ans.  I  saw  Captain  Miller  and  Captain  Balfry  of  the  Cunard 
line  and  they  say  no,  the  spray  does  not  freeze  on  the  cabins 
above  the  hull,  except  to  a  slight  extent  when  tney  are  maxing 
a  very  iiorthern  passage  on  the  very  much  Horth  of  Scotland.  On 
cold  days?  snow  Say  hold  on  the  deckhouses,  but  not  to  any  ex¬ 
tent. ComLder  Wells  of  the  British  Admiralty  also  confirmed 

Your  question  Ho.  2:  "Approaching  England,  Ireland  and  Scot¬ 
land,  same  distances  as  Ho.  1,  do  you  ever  encounter  any  small  ice, 
frequent,  infrequent,  or  not  at  all”. 

Ans.  i’hey  all  said  right  away,  Hever. 

As  to  the  third  part  of  your  memorandum,  relating  to  eioudy 

We  vent  on  board  of  one  of  their  ships  at  the  dock  to  look, 
this  .«««■»*  ”•*  ’>•  BP“Sl  £'“ 

the  ship . 

It  vas  therefore,  up  to  me  to  make  a  hunt  around  town  to 
It  was,  nnererore,  „  t  bookB.  1  have  spent  the 

Eneland  Pilot".  I  am  sending  them  to  you  herewitn. 
randura  in  each  book  showing  you  the  pages  to  look  at. 

was  impossible. 

2hen  I  tried  to  get  a  pilot  book  for  Ireland,  but  found  it 

t  went  to  the  U. 

and  picked  up  the  pilot  sheets,  which  I  sent  you  hy  Hunley  yesterday. 

I  went  to  a  number  of  places,  and  also  tried  the  United  States  Weather 
Bureau,  but  they  had  nothing  that  I  wanted.  Chen  I  went  to  the  Brit¬ 
ish  Counsel, and  as  a  last  resort  to  Captain  Gaunt's  office.  He  was 
away,  but  1  hod  a  little  conference  with  his  Secretary,  who  said  she 
would  try  and  help  me  out.  She  went  somewhere,  and  finally  came 
back  and  took  me  to  see  Commodore  Wells  of  the  British  Admiralty.  I 
guess  he  is  the  man  who  has  the  say  as  to  what  ships  shall  go  out.  He 
had  his  own  personal  copy  of  the  Irish  Coast  Pilot  3ook,  which  he  said 
he  was  constantly  using,  but  to  help  you  he  said  he  would  loon  it  to 
me  for  a  few  hours  to  photograph  such  parts  as  I  thought  desirable. 

Cherefore,  in  addition  to  the  two  books  above  mentioned, 

I  am  sending  you  the  photogrphed  pages  from  the  Irish  Pilot  Book. 

I  trust  all  of  this  will  help  you  out  and  give  you  the  information 
you  are  after. 

I  learned  from  the  U.  S.  Hydrographic  Office  in  Hew  York 
that  at  Headquarters  in  Washington  they  also  published  Pilot  Books. 

In  fact,  they  showed  me  one  of  them,  but  it  did  not  seem  to  have  as 
much  information  as  books  published  by  the  British  Admiralty.  However, 
to  make  sure  and  get  all  possible  information  I  telephoned  Captain 
Smith  in  Secretary  Daniels'  office  and  ask  him  to  get  me  the  pilot 
books  for  South  and  West  Coasts  of  England  and  the  Coasts  of  Ii eland, 
published  by  the  U.  3.  Hydrographic  Office.  He  promised  he  would 
attend  to  it  yesterday  afternoon.  I  have  received  the  books  this  morn¬ 
ing  and  am  sending  them  down .together  with  the  British  Admiralty  books 
and  photos  of  the  tables  from  the  British  Admiralty  book  of  the  Irish 

P.S.  I  thought  it  would  be  much  appreciated  if  you  would  send  a 
letter  of  thanks  to  Commodore  Wells.  I  could  not  have  gotten  the 
Irish  book  anywhere  else.  Will  you  please  sign  attached  letter. 



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October  4,1917 

Commodore  Rolls,  E.  il.,  ’ 

8th  Floor,  Annex, 

44  Vihit ohall  Street, 

-  liew  York,  li.Y.’ 

lly  dear  Sir:-  '  . 

lip.  Llcadoweroft  haB  informod  mo  of  your 
courteous  reception  of  him  on  Tuesday- last  and  also 
of  your  kindness  in  lotting  him  take  away  your  copy 
of  the  Irish  CoaEt  Pilot  Book  for  tho  purpose  of  photo¬ 
graphing  a  few  pagos  for  my  use  -  .  , 

Allow  me  to  extend  my  porconal  thanks  to  you 
and-  appreciation  of  your  kindness  in  ontrusting  my 
Assistant  with  your  only-copy  of  this  valuablo  book. 

I  endorse  Ur.  Ilcadowcroft'o  invitation  to  you  to  call 
in  at  the  Laboratory  some  day  whon  1  am  at  home.  I 
shall  be  glud  to  have  tho  pleasure  of  -shaking  hands 
with  you.  ' 

October  4,1917. 

Capt.  Ti.frvlng  Chambers, 

1034  Eye  Stroot,  H .  L . , 

Lashington,  D.  C. 

hear  Lir 

Xour  favor  of  tho  19th  ultimo  to  -Hr.  Edison 
containing  "Sfcudy  of  a  Direct-Lifting  Airplano,  etc.'"" 
comprised  in  32  pagoB  of  typewriting,  together  with  prini 
of  your 'Bnetchos  came  to  hand..  -  - 

let  mo  say,  for  your  information,  that  L!r .  Edison 
has -never  made  a  technical  study  of  aoroplaneB.  Hu  is  out 
or  town  at  proaont  and  is  not  expoctofi  to  return  for  eovoral 
woeka .  If  he  woro  hero,  I  am  quite  sure  thot  he  would  ask 
you  to  oxo use  nim  ffcom’ passing  any  opinion  upon  the  points 
comprisod  in  your  study,  as  aoroplanes  aro  out  o:  his  lino 
of  active  endeavor. 

If  you  wish  to  loavo  the 
Shown  to  him  on  his  return,  I  will 
but  if  after  reading  tho  above  you 
returned,  I  shall  act  accordingly. 

papers  in  my  hands  to-be 
tako  good  caro  of  thorn, 
wish  to  havo  tho  panorc 


Yours  very  truly. 

issietunt  to  Hr.  Edison. 


X.uAa.  CU4 

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Hatol  CasrsiJijrnre  Board 


October  4,  19X7. 

Temporary  special  license  for 
Prank  Kingsland. 

1st  class  pilot  steam  vessels 
Serial  #27516 
Pile  #18003 
Issue  #1-1 

District  of  Hew  York. 

Vessels  not  over  250  tons,  H.Y. 
Bay  and  harbor  to  Yonkers,  hafi o 
Hiver  to  Stepping  Stone,  Peb. 
is,  1917. 

1.  Ur.  Hdison  is  at  sea  on  the  OSS.  SACHEM, 

192  with  which  he  has  been  furnished  by  the  ilavy  Depar  - 
ment  for  experimental  purposes. 

o  iia  has  been  using.  in  conjunction  with  his 
work,  a  50* foot  gasoline  launch  commanded  by  Prank  Kingsland. 

3.  It  now  beoomos  necessary  to  i 
and  the  "Hydraulic”  of  Had  Bank,  li.  nI 
yacht  has  been  chartered  by  Ur.  Edison. 

4.  He  respectfully  requests  that  a  special  permit 
be  issued  to  Prank  Kingsland  of  above  reference  to  navigate 
the  Hydraulic  within  your  Jurisdiction. 

B.  As  noon  as  the  exigencies  for  Kingsland 's  ser- 
vi oe  oouses ,  you  will  be  advised. 

6.  The  above  information  came  to  ne  by  telephone 

7.  In  absence  of  proper  name  of  vessel,  will 
you  please  issue  :.ennit  to  operato  any  stoam  vessel  not 

f^eiffhtn?o8Eh^00t  i0n?th*  t0  oarry  n°  paBsenpors  or 
freight  for  nire  unci  to  be  under  Hr.  Kdiaon's  direction. 

-tespeotfully , 

local  hoard  of  Steamboat  Inspector 
How  an von.  Conn.  ’ 

-T.  PROCTOR  o  HALL  "  -JL  |(L-  ^  <2-^-w  Wu>o.  >-•» 

1301  DAVtE  STREET  «— |1'<  4*  ("t, 

VANCOUVER.  CANADA  V~t<^-M  iXUJU  V<vl*Cj«  ^  fc  ( 

A'  FOQ/SYE .  ^ 

This  is  a  device  for  determining,  in  darkness  and  in  fog,  the'62-^ 
direction  and  distanoe  of  any  object  whose  temperature  differs 
from  the  temperature  of  the  surrounding  region. 

Langley’e  bolometer  is  the  basis  of  the  device.  Two  equal  re¬ 

sistance  strips  of  platinum  a 

9  wound  in  parallel  c 

drum-frame,  which  is  placed  at  the  focus  for  parallel  rays  of  a 

parabolic  reflector.  The  strips  « 

j  made  to  occupy  the  first  and 

third  positions  of  the  resistances  in  a  Wheatstonds  bridge. 

A  second  refleotor  placed  beside  the  first  contains  similar  strips 
which  ocoupy  the  second  and  fourth  positions  in  the  bridge. 

A  heavy  metal  box  ,  to  guard  against  electric  and  temperature 
disturbances,  surrounds  the  pair  of  reflectors;  and  the  whole  is 
mounted  so  as  to  rotate  about  a  vertical  axis. 

The  usual  galvanometer  is  replaced  by  a  telephone.-  The  circuit  is 
provided  with  an  interrupted  or  an  alternating  current  of  moder¬ 
ately  high  voltage;  and  the  circuit  is  so  balanced  that  a  slight 

ately  high  voltage;  and  the  circuit  is 
sound  is  heard  in  the  telephone. 

he  reflectors  are  placed  side  by  side,  so  that  their  fields  do 
ot  overlap.  They  are  rotated  slowly.  When  the  first  is  directed 
oward  a  steamer  or  an  iceberg  the  balance  is  disturbed  and  the 
ioise  in  the  telephone  is  increased  or  diminished.  An  indicator 
lives  at  once  the  direction  and  angular  dimension  of  the  disturb- 

i  Bhip,  with  its  pointer 

(compound)  indicator,  will  show  c 

r  tf  n*  \ 

the  exact  location  of  the  object. 

(Fog-eye  2) 


Rough  preliminary  experiments  have  shown  that  the  device  is 
workable.  It  remains  to  test  its  applicability  under  service 
conditions .  This  the  Board  of  Inventions  can  do  much  more  quickly 
than  I  oan. 

October  5,  1917. 

Very  truly  yours 

October  5,  19X7. 


Shomas  A.  Edison,  Esq.., 

lSeBt  Orange,  N.J. 

Bear  Mr.  Edison:- 

I  have  reoeived  from  Liverpool  a  report  of 
the  oommentB  of  their  praotioal  people  on  the  ohanges 
that  were  made  in  sooordanoe  with  your  suggestions  to  our 
S/s  "Valeria",  and  as  I  know  you  will  be  greatly  interested 
/  in  the  result  of  her  first  voyage,  I  enoloBe  herewith 
oopies  of  these  communications. 

Ihe  only  difficulty  appears  to  be  the  matter  of 
loss  of  speed  when  burning  anthraoite  coal,  and  of  oourse 
to  obtain  the  best  results  of  your  plan  the  "Bmoke  flag" 
must  be  overcome. 

Any  further  suggestions  you  may  have  to  make  will 
be  very  greatly  appreciated. 

For  your  information  the  "Valeria"  is  now  in  port 
and  should  you  wish  to  inBpeot  her  I  shall  be  very  happy 
indeed  to  grant  you  full  facilities  on  reoeipt  of  your 



Exoerpt  Glasgow  Diary  September  7th,  1917 

S.S.  "VALERIA*  Referring  to  your  special  letter  of  21st  August,  we  are 
informed  that  the  experiment  with  anthracite  coal  was  quite  a 
failure.  No  doubt  our  Cunard  friends  will  be  able  to  give 
you  a  detailed  report,  but  it  seems  that  whilst  the  coal  was 
smokeless  it  was  of  very  inferior  quality  for  steaming  purposes, 
and  the  speed  of  the  steamer  fell  ott  2/3  knots  per  houri  Naturally 
we  are  not  encouraged  _tfl_ make  any  experiment  on  these  lines . _ 

U-f  13 

n  yuJL,  -  fc< 




Cunard  Building 


T.  Ashley  Sparks,  Esq., 

New  York. 

10th  September  1917 

Dear  Sir, 

We  beg  to  acknowledge  receipt  of  your  confidential  letter 
of  the  27th  August  regarding  the  arrangement  being  carried  out  by  the 
United  States  Shipping  Board  following  the  lines  of  your  experiment 
with  the  ".VALERIA*.  The  blue  print  referred  to  therein  however  has 
not  come  to  hand  and  the  Censor  has  attached  a  slip  to  the  letter 
stating  that  the  enclosure  was  missing  when  the  communication  was 


Your 8  faithfully, 


(Signed)  R.  C, 



Communication  dated  10th  September,  1917 
Prom  Superintendent  Engineer,  To  The  General  Manager, 


Por  New  York 


Re  Chief  Alterations  on  vessel  while  in  New  York 

In  reply  to  your  memo  re  alterations  carried  out  on  the  above  ship, 
inspection  has  been  made  and  the  following  are  the  principal  items:- 

The  two  masts  were  cut  away  from  about  15  feet  above  the  deck. 

A  temporary  wireless  pole  was  fitted  on  top  of  masts  having  pulleys 
attached  to  same  for  running  up  canvas  screens  fore  and. aft  on  deck. 

Projecting  bars  at  fore  and  aft  end  of  ship  were  also  fitted  to  attach 
canvas  screens  on  Bame. 

Three  Sampson  posts  on  poop  have  had  about  8  ft.  cut  off,  also 
three  Sampson  posts  for  deep  tank  cargo. 

Three  lengths  amounting  to  23  feet  have  been  removed  from  the  funnel 
and  the  waste  steam  and  whistle  pipes  have  been  altered. 

3-J-  feet  have  been  cut  away  from  the  Btokehold  and  engine  room 

Arrangements  have  also  been  made  for  fitting  canvas  screens  fore 
and  aft  above  decks. 

The  result  of  these  alterations  is  that  the  ship  has  had  to  discharge 
her  cargo  at  a  berth  where  cranes  were  available  • 

The  Chief  Engineer  reports  that  the  Anthracite  Coal  supplied  in  / 
New  York  was  smokeless,  but  on  trying  to.  burn  it  in  the  danger  zone  he  / 
could  only  obtain  140  lbs.  pressure  oh  the  boilers.  When  this  was  dis¬ 
covered  they  discontinued  using  the  coal  as  the  speed  of  the  ship  was 
considerably  reduced. 

To  give  the  smokeless  coal  a  further  trial  it  is  suggested  that  the 
ship  should  be  provided  with  a  quantity  of  Welsh  smokeless  ooal  for 
using  when  passing  the  danger  zone. 

Regarding  the  visibility  of  the  ship,  we  have  not  seen  her  at  a  great 
distance,  but  from  appearance  she  resembles  a  torpedo  boat  destroyer, 
that  is,  when- the  canvas  sheets  have  been  removed;  and  without  doubt,  sne 
will  be  less  visible  and  more  safe. 

We  condier  that  unless  smokeless  coal  is  provided  in  the  danger  zone 
the  alterations  willN  not  give  the  best  results. 

(Sgd)  A.  Galbraith 



Communication  dated  10th  September  1917 

Prom  Marine  Superintendent 

To  The  General  Manager 


r£is  tssjsVL nss  “?  ys&$ 

which  is  first  seen,  aay  at  a  distance  of  fifteen  to  twenty  miles. 

,  I  am  certain  that  in  the  case  of  the  "VALERIA«wlthherpreeent 

I  Commander  would  heuitate  before  going  any  closer. 

Of  course,  the  scheme  is  rendered  valuelescrwhen  the  ship  comes 

y  going  to  a  crane  berth  as  we  had  to  do  on  this  occasion. 

(Sgdj  D.  Lyon 



Communication  dated 

From  Supt.  Wharfinger 

10th  September  1917 

To  The  General  Manager 



Referring  to  conversation  with  Mr.  Litchfield  on  Friday  afternoon, 
I  would  respectfully  suggest  that  our  American  friends  be  advised 
that  in  the  above  vessel's  present  condition  it  is  impossible  to 
discharge  any  package  over  30  cwt.  without  requisitioning  a  Floating 

The  said  Cranes  are  at  a  premium  and  consequently  serious  delays 
might  take  place,  for  as  matters  stand  at  present  the  vessel's 
discharge  is  already  protracted  owing  to  our  not  being  able  to  rig 
any  ships  gear. 

Yours  respectfully, 

(Sgd)  Henry  T.  Cutts 

'  % 



The  Cunard  Steam  Ship  Company  Limited 
General  Manager's  Office 

Cunard  Building, 

11th  September,  1917 

T.  Ashley  Sparks,  Esq., 
Mew  York. 

Bear  Sir, 


With  reference  to  your  letter  of  the  27th  July  to  Mr.  Mearns 
and  also  to  your  letter  of  the  24th  August  on^the  subject  of  the 
disguise  of  this  steamer,  you  will  doubtless  be  aware  that  the  ship 
came  over  in  convoy  and  thiB  circumstance  naturally  rendo red  it 
difficult  to  express  an  opinion  as  to  how  successful  or  otherwise  the 
alterations  would  prove. 

Captain  SteWart  reported  that  when  UBing  the  anthracite  coal 
"V  it  was  impossible  to  maintain  steam  with  it  and  they  had  to  fall  back 
43  i  upon  their  ordinary  coal.  Of  course  under  the  circumstances  this  did 
-  x  not  greatly  matter  but  the  poor  steaming  qualities  of  the  ln_ 

are  a  decided  weakness.  The  Captain  also  reported  that  with  a  following 
J  breeze  it  was  difficult  to  remain  on  the  bridge  with  the  smoke  and 
3  1L. noxious  gases .  He  will  doubtless  explain  matters  more  ill  detail  to 
’Vyourself  on  his  return. 

ii  In  the  meantime  we  enclose  copies  of  reports  received  from 

f  {  our  Superintendent  Engineer,  Marine  Superintendent,  and  Superintendent 
^  J  Wharfinger,  which. contain  expressions  of  opinion  from  their  points 
of  view  and  which  you  may  be  glad  to  have. 


of  view  and  which  you  may  be  glad  1 

It  is  impossible  for  us  to  obtain  a  supply  of  South  Wales 
coal  as  suggested  by  the  Superintendent  Engineer,  but  in  any  event 
if  the  ship  is  to  go  in  convoy  this  coal  is  unnecessary  as  no  other 
of  the  ships  would  have  South  Wales. 

Yours  faithfully, 

(Signed)  R.  C. 

Offioa  of  Secretary 

FUNCTION:  Laboratory  Memorandum  No. 

'  SUBJECT i  Charter  of  "Hydraulic."  Date  10/6/17. 


Ur.  A.  U.  Kennedy, 
o/o  Yaoht  "Bampant," 
Greenport,  New  York. 

Immediately  upon  reoeipt  of  your  memorandum  of  the  4th,  which  arrived 
yesterday,  I  telephoned  Ur.  Irwin  regarding  the  "Hydraulic"  and  have  received 
from  him  this  morning  the  agreement  he  signed  with  Maximillian  Zwickl  in  Ur. 
Edison's  behalf  for  this  boat.  I  then  tried  to  get  Ur.  Zqiokl  on  the  tele¬ 
phone  to  inquire  whether  or  not  he  had  her  insured,  but  have  not  been  able  to  get 
him  up  to  this  writing.  We  are  therefore  taking  a  chanoe  and  endeavoring  to 
bind  insurance  of  §3,500  on  the  boat  pending  the  time  I  oan  get  into  touch  with 
Ur.  Zwiokl. 

Your  memorandum  was  the  firot  information  I  had  that  another  boat 
had  been  taken  on.  The  agreement  with  Zwickl  provides  for  the  boat  for  the 
month  of  Ootober  only. 

Copies  to«- 



Send  the'followinji  telegram,  subject  to  tlie  terms 
on  bifolc1  hererff1_SThjcb"aro.!iprcb^^reed^to 

WWW.  48  MY  R  9 

GREEMPORT  n  805AM  OCT  6-17 

edisom  lab,  orange  nj 




Gctobor  0,1917. 

U.  0.  Hydrographic  Office, 

•  70  Broad  Street, 

How  'fork;  XI. Y. 

Gentlemen :  > 

Can  you  spai-cno  another  cot  of  Pilot  Hags 
showing  tho  Snplleh  Coast  with  percentage  of  fog,  etc. 
•  marked.  - 

About  a  wook  ago  you  kindly  gave  a  sot  of 
those  for  twelve  months  to  my  Assistant,  Ur.  K.  H.  ilcadow- 
croft.  i  canraako  good  use  of  another  set  if  you  can 
spare  the- same.  If  so,  will  you  kindly  hand  them  to 

Yours  very  truly. 

October  0,1917. 

Commanding  Of  floor-, 

U.  S.  aviation  Hendquur tore, 

-Uinoola,  Long  Island.  - 

-Dear  Sir:- 

I  am  working  on  some  experiments  for  locating 
distant  ..oroplnnes  for  the  Army,  and  Davy  Departments,  and 
would  like  to  have  one  of- my  assistants,  i:Ir.  i.  ill  inn  Doans 
given  the  privilage  of  making  some  onpoi imcnto  for  me  in 
your  grounds.  I  trust  you  can  arrango  this  raattor  accord 
lugly.  ilr.  Deans  will  oxplain  the  details  of  what  he  . 
wishes .to  do. 

Yours  very  truly, 


g  V/foon  t.stnrtfl 

9— g-lgh-t-alomg- . 

rr^yTS^ress . 


October  S,  1917. 

Purchasing  Officer, 
U.  S.  Coast  Guard, 
507  Hudson  Street, 
Hew  York,  H.  Y. 

Dear  Sir: 

Confirming  telephone  conversation  had  this  morning  with 
this  office,  it  is  reruested  that  tnere  oe  loaned  to 
Thomas  A.  Cdison,  for  his  use  in  making  experiments,  one 
2-1/2"  iyle  life  line  gun.  The  gun  is  to  be  returned  v.non 
it  has  served  its  purpose. 

Please  ship  the 
SACHD.'.i  (S.P.  7192), 
Heights,  H.  Y. 

above  to  the  Commanding  Officer, 
,  c/o  Gas  Engine  &  tower  Company, 

U.  S.  S. 

Very  respectfully, 

C/C  tot4r.  W.  H.  Meadowcroft, 

0/0  Edison  laboratory. 

Orange,  N.  J. 

Commanding  Offioer,  U.  S.  S.  SACHEM  (S. P.192), 
0/0  Gas  Engine  &  Power  Company, 

Morris  Heights,  N.  Y. 

■  *  v  CL 

4^Lo-v  /Lov  ,’  ;S) 

^4—  "*f 

Ls&-  ^>*f£*~* 

h:  tczrL^.  fcs-  f*-1 

T7  , _ J* 

October  9 j 1917. 

iteming  ton  nrms  Union  Metallic  Cartridge  Co., 

Union  Metallic  Cartridge  Y.orks, 

Bridgeport,  Conn, 

Bear  Sirs: 

i’or  use  in  connection  with  Mr.  iScison's  exnori- 
mental  work  for  the  Government,  we  would  like  to  secure 
about  two  hundred  .22  calibre- center  fire  cartridges  with¬ 
out  the  load  bullets.  - 

be "under stand  that  the  rim  fire  blanks  are  not 
entirely  dependable  for  firing,  and  our  exporioneo  with 
.  different  lots  has  confirmed- this  view.  be  wish  to-  use 
the . cartridges  to  mechanically  ignite  a- fuse  and  aro  "open 
to  suggestions  for  other  6f  your  products  which  might  answer 
this  purpose.  .  ' 

If  yoji  think  that  the  Centre  fire  cartridges  will 
..answer  Mr..  Kdison’s  purpose,  will  you-  please  sond  mo  £00 
right,  away.  Please  address  them  to  me. 

Yours  very  truly. 

Assistant  to  Mr.  id! son. 

Ott.  io,tq, 7, 

l^&atiAsda^,  9  ^Ai^itCXiA  rti>  the  GJ^uCevX ,  aj~t&*- 


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IW^Jl Cc^utcta  iu.  &LJo  JitXtju,  f  3-aclm l^u., 

Hatol  Caffsvrcnnre  B© mm 


October  10,  1917. 

Mr.  A.  M.  Kennedy, 
c/o  Yacht  Rampent, 
Port  Jefferson,  1.  I. 

Dear  Ahe 

1.  x  received  notation  from  the  Steamboat  In¬ 
spectors,  Hew  Haven,  Connecticut,  that  it  would  be  necessary 
for  i’raiik  Kingsland  to  appear  before  thorn  for  examination 
to  navigate  waters  under  their  jurisdiction. 

a.  I  thereupon  telegraphed  you  as  ner  cony 
enclosed  herewith. 

3.  She  laws  of  the  Steamboat  service  are  very 
drastic  and  I  doubt  whether  anyone  could  make  an  ex  cert  ion 
to  them  except  the  Chief  Inspector  or  rather  the  nead  of 
the  Steamboat  Inspector's  Service,  at  ..asnington  D.C.  Inas 
much  as  Ur.  Edison  is  now  in  Washington  for  four  days, 

Kingsland  would  ho  doubt  have  an  opportunity  of  going  oiei 
to  Hew  Haven  to  take  his  examination.  It  is  not  voryfar 
from  and  he  could  go  over  in  a  gasoline  launch, 

Perhaps,  however,  yiu  will  need  the  ^soline^unch  and  he  had 
better i fo  over  oA  some  sort  of  boat  that  IsESa  between  Port 
Jefferson  and  Connecticut  shore.  I  do  not  know  anything  abou 
that  so  you  will  have  to  work  that  out  to  suite  yourself. 

5.  I  have  written  to  the  Steamboat  Inspectors 
asking  that  the  -clause, «one  certificated  li  feboat  man  re quire d 
be  waived  in  this  case.  I  do  not  know  wnat  dispositions  will 
be  made  of  this  but  before  I  will  let  that  go  through  I  will 
take  the  matter  up  with  the  Steamboat  Inspector  Service  in 

_  n„+  t.n  o-et  into/ serious  permanent  trouble 

X  therefore  suggest  that  you  live  up 

n  of 

n  If  an-  of  the  men  get  into  trouble  by  reas 
any  ,„oi»l  itort.  1*  »  *><»,  «*  I  1U  t<*.  M»  ™«. 


9.  I  am  horribly  busy.  Shis  is  only' ^®°^J0“lelxt 

I  have  had  at  home  since  ray  ^’^em^nSTbring  them  East.  I  stof^d 
x  went  out  t0b^“lfL^sf  B0bbie  Sas  started  to  school  and 
at  T/oodside  about  nix  hours.  h  shown  them  all  the 

10.  i  eSi»E  t.  " V;.' 

«.  a-  M  £  -  -  5!  sts  “““ 

12.  I  will  bear  in  mind  what  you  say  about  going  South 
after  the  war  is  over. 

13.  With  best  regards  to  yourself  and  all  the  boys, 

I  remain 

Yours  verytruly, 



55  NY~  R  27  COLLECT  ,  - 


henry  ALT  ENG  art  EN 





news  .... 

91 7  A, 

American  Institute  of  Electrical  Engineers 


Edison  Laboratory, 

Orange,  K.J. 

Oct.  12,  1917. 

Mr.  W.  H.  Meadowcroft, 

c/o  The  Shoreham  Hotel, 

V/ashington,  D.C. 

Dear  Mr.  Meadowcroft, 

Mr.  Altengarten,  this  afternoon  told  me  that  you 
had  obtained  official  permission  for  me  to  carry  on  my  experimental 
work  at  Mineola.  I  thank  you  for  your  efforts  in  this  particular. 

There  is  now,  another  matter  of  which  I  want  to  speak  to  you,  in 
the  hopes  that  you  will  take  the  matter  "up  with  Mr.  Edison.  This  is 
the  matter  of  my  being  able  to  take  a  car  with  me  to  Mineola.  In 
performing  my  tests,  I  shall  not  only  want  to  locate  the  machines 
while  they  are  in  the  air,  but?  I  shall  a}so  want  to  try  to  get  them 
as  they  rise  off  the  ground.  And  in  doing  either,  I  shall  want  to 
mave  from  place  to  place  with  my  apparatus.  This,  it  is  practicality 
impossible  for  me  to  do  on  foot.  As  I  shall  probably  make  several 
changes,  of  considerable  distances,  in  one,  day,  you  can  perhaps  see 
how  important  it  is  that  I  have  some  means  of  conveyance.  If  I  had 
a  car,  which  I  could  keep  out  there  with  me  during  the  time  of  my 
tests,  I  could  3et  up  my  apparatus  in  the  car,  and  move  around  from 
place  to  place  making  the  necessary  observations.  Also,  my  having 
the  car  would  expedite  matters  considerably.  It  is  almost  impossible 
for  me  to  get  along  without  a  car,  in  fact,  for  in  trying  to  move  about 
on  foot,  I  should  of  necessity  make  several  trips  to  carry  the  apparatis 

to  my  new  place  of  set  up.  You  can  readilly  see  that  this  performance 
will  needlessly  consume  a  great  amount  of  time.  Not  only  that,  but 
while  I  am  in  transit  between  the  new  and  the  old  place  of  set  up  my 
apparatus  will  be  exposed  to  the  possibility  of  being  tampered  with 
by  curious  people,  not  only  manually,  but  also  visually,  which  is 
equally  important. 

Now,  if  Mr;  Edison  is  of  the  opinion  that  I  may  have  the  use  of  a 
car,  may  I  strongly  urge  that  I  have  permission  to  take  the  old 
Hupmobile,  which  is  undergoing  repairs  now,  in  the  garage.  You  see, 

I  shall  want  to  permanently  set  up  my  apparatus  in  the  back  of  the  car. 
this  will  mean  the  use  of  a  tripod,  or  a  support  having  a  wide  base, 
together  with  a  sort  of  table.  In  the  back  of  the  Hupmobile,  there  is 
room  for  this  apparatus.  This  car  is  at  present  not  in  commision,  and 
therefore  could  best  be  spared.  Also,  I  am  familiar  with  the  opera¬ 
tion  of  this  particular  car,  so  there  would  be  no  trouble  on  that 

Hoping  to  have  Mr.  Edison's  "O.K."  on  these  proposals,  and  thanking 
you  for  your  attention  in  the  matter,  I  am, 

Yours  sincerely, 

p.  S.  Should  you  wish  to  answer  by  telegraph,  Sunday,  please 
address  the  telegram  to  my  home,  236  So.  Burnet  Street,  East  Orange, 
New  Jersey. 


16NYJ  37  ML  NL 

WASHINGTON  0  C  OCT  14-17 




Ootober  IB-,  19X7; 

Hutch  ins  told  me  of  the  cooperation 
you  extended  in  the  Hard  Coal  tests  by  lending  Hr. 
Andrews  for  the  "HUROH"  voyage. 

I  want  to  thank  you  personally,  for 
this  assistance  which.  I. assure  you,  is  highly  app.e 
dated.  *  ... 

Yours  sincerely. 

.  ’  PRESIDE!!?- 

Edison  Eleotrioal  Illuminating  Co. , 
Boston,  Hass.. 

October  15,  1917. 

.My  dear  Irish : 

Hatch  has  told  me  of  the  many  splendid 
and  ratriotio  acta  on  the  part  of  yourself  and  the 
capable  personnel  of  your  Company  in  regard  to  the,  ' 
Hard  Coal  tests  and  Directions  for  firing  Hurd  Coal 
which  have  be on  completed. 

Too.  will  receive,  in  a  few  days*  a  for¬ 
mal  latter'  of  appreciation  from  the  Mural  Consulting 
Board,  but  I  want  to  toll  you  myself  how  much  I  appro- 
'  date  your  loyalty  to  your  Country  :.nd  to  your  old 
friend  who  asked  you  to  help  us  out’  in  this  matter. 

It  is  just  the  friendship  and  example  of 
suoh  men  as  you  that  makes  this  World  worth  while. 

With  many  t :  >.anlcs ,  I  remain 

Yours  sincerely. 


Ur.  John.TT.  Iiieb,  V.  P.. 

Hew  York  Kd is  on  Company, 

15th  Street  and  Irving  Place, 

October  15,  1917. 

My  dear  Mr.  Raymond;-' 

Permit  me  to  thank  yon  personally 
for  the  splendid  corporation  and  assistance  rendered 
by  you  and  the  personnel  under  your  direction,  in  the 
Hard  Goal  test  just  completed. 

Hutchison  has  told  me  how  magnanimous¬ 
ly  you  fell  in  with  the  plan  and  how.  willingly  you  and 
the  personnel  of  your  Btaff  and  the  officers  nnd  crew 
of  your  S3  "PAWNEE"  and  "HURON"  rendered  every  service 
to  make  the  test  successive. 


With  kindest  personal  regards-  I 

Yours  sincerely. 


Mr.  H.  H.  Raymond,  Pros., 
Clyd,e  Steamship  Company, 
Pier  36,  North  River,  It.  Y. 

fyd a&CH^txnt,  ,  ®  • 

<3W,  AT,  Icji'}. 

x^taA.  fyfc.  Ibi* 

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a-Aeo^C  A,tS>  /Kk 


fair*  £.  -  /Chaua-vha.  f  fyo^yie.  omU)  v? 

o-tAAj  , 



Oct.  15,  1917. 

To  the  Members  of  the  Haval  Consulting  Board, 

Dear  Sirs  : 

Please  be  advised  that  the  next  meeting  of  the 
Board  will  be  held  on  Saturday,  Oct.  20,  at  the  Carnegie 
Institution,  Washington, 

The  informal  preliminary  meeting  will  begin  at  nine 
cfclocl:,  and  the  tegular  meeting  at  ten. 

Very  truly  yours, 

Thomas  Robins, 

Secretary.^,  ^ 

THE  WORLD:  MONDAY.  OCTOBER  20,  19]  7. 

ft.  A.  Caldwell, 

Manila,  P.  I. 

Manila,  P.  I.,  Oct.  20th,  1917. 

Mr.  Thomas  A.  Edison, 

Navy  Advisory  Board, 

.Washington,  I).  C. 


Will  you  kindly  do  me  the  favor  to  obtain  from  the 
Navy  Department  their  File  No.  30931/924(E2)-0  and  let  me 
know  what  you  think  of  ray  device  for  firing  large  guns 
from  aboard  ship  in  rough  seas? 

The  Bureau  of  Ordnance  thinks  it  impracticable,  but 

I  have  consulted  with  a  naval  gunner  who  thinks  different-  - 

ly.  For  my  part,  I  don't  see  any  defects  in  it  that  might 
not  be  overcome  by  use  of  a  gyroscope. 

I  would  enclose  stamps  for  reply  but  for  the  fact  that 
Philippine  Stamps  cannot  be  used  in  the  U.  Si  A. 

Hoping  that  you  will  favor  me  with  a  reply,  I  remain, 
Very  respectfully, 

■  .  ’  ’ 


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ORANGE,  N.  J. 

120  MY  R  16  COLLECT 









1 21  MYR  1 2  3o!&(M  AIN  ST. 

ORArMAC|^riNGtlON>do  255PM  OCT  23 




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RAulCuDH:  for  Bhomas  A  Edison  comma  general  board  room  comma 
Savy  Annex  comma  Washington,  DC  period  Anchored  off  Bremen  pier 
number  one  Hoboken;  all  machinery  installed  period  udtrisc  by  radio 
if  extended  trip  planned  and  time  of  my  departure  so  can  store  up 
period  Heady  now  for  local  work  signed  lieutenant  Hatton  Command¬ 
ing  Officer,  U33  LiACHEil  10123 



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October  2£,l'Jl7. 

3.  I.  Du  Don!  do  ilernours  Co . , 
Wilmington,  Doi. 


Gentlemen : 

i.o  wish  to  uso  compressed  nun  pov.dor  uc  a 
shell  bursting  chargo  in  connection  with  k.r .  Adison's 
experiments  f  r  the  Government. 

I.o  understand  that  you  muko  perforated  cylinders- 
of  'eonprossod  pov.dor.  l?or  our  purpose  a  diameter  of 
1-3/4  -  2  inches  and  a  thickness  of .1/2  -  1  inch  would 
be  prefers. jIc. 

If  you  can  furnish  this  material,  kindly  o:qu esc 
us,  at  once  ten  ( 10 1  pounds  for  testing  purposos,  sending 
same  to  me  at  the  iidison  laboratory.  Orange ,  il.J. 

Yours  vory  truly. 

Assistant  to  iir.  Adison. 

?.G.  Will  you  also  send  somo  information  about  the 
tine  detonators  you  raahufucturo. 



B365NY  52  GOVT' 

1917  OCT  25  PM  4  08 


FY  ORANGE1  NJ  34  6P  25  / 

MR  THOMAS  A1  EDISON  4239  •. 




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.  I 






i:»  I*AKK  Row.  Nkw  Vokk 

October  26,  1917. 

To  the  members  of  the  Naval  Consulting  Board, 

Bear  Sirs; 

Biease  be  advised  that  the  next  meeting  of 
the  Board  will  be  held  on  Saturday,  November  3  at  the 
Carnegie  Institution,  Washington. 

The  informal  preliminary  meeting  will  be 
held  at  nine  o’clock,  and  the  regular  meeting  at  ten 

Very  truly  yours, 



£&&!<>-*. I  .  C&-d'  -«»—«.  2££<  /i jCje*-£wt^ 

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d2^  yyf  /f/y. 

■L'°  '‘hota  It  Hay  Concorn: 

"h°  beerer  of  this  note,.  Hr.  Samuel  C. 

Shaf fnor .  its  ope  of  tho  Experimenters  from  my  laboratory. 
anfl  is  enpapod  on  Government  work.- 

Any  lnf0raaUon  Sivon,  or  courtesies  extended 
will  he  appreciated  Ain  behalf  of  tho  Governmont. 

Offioe  of  Secretary 

FUNCTION:  Laboratory 

SUBJECT i  Yacht  Yankee  III 

Memorandum  No.  rfO . 
Date  0ot.  30,  1917 

Mr.  A.  M.  Kennedy, 
o/o  Yacht  Rampant, 

General  Delivery, 

Greenport,  L.  I. 

In  accordance  with  your  suggestion  in  memo,  of  the  18th 
I  wrote  IV.  E.  Spencer  Co.  under  date  of  October  20th  asking  for 
a  complete  statement  of  their  account.  I  am  sending  the 

original  of  this  to  you  herewith,  together  with  Spencer's  letter 
dated  October  22nd.  If  this  is  correct  and  closes  up  the 
matter,  kindly  0.  K.  and  return  to  me  so  that  we  may  remit  to 
Spencer  to  balanoe  the  aooount.  Please  return  the  papers 
herewith  with  your  reply. 

I  understand  from  your  memorandum  that  Mr.  Edison  had 
this  boat  only  two  weeks.  The  rental  was  to  be  $1,200.  for 
three  months  or  $400.00  per  month.  You  will  note  that  Spencer 
has  made  no  charge  on  his  statement  for  use  of  the  boat  but  has 
credited  $200.00  against  the  charges  shown.  This,  of  course, 
represents  one-half  month's  rental  and  the  credit  would  appear 
to  be  correct  if  the  other  items  meet  with  your  approval. 

Copies  toi- 



Pont  de  Nemours  X  Company 
Wilmington, Delaware 

Powder  Pellet: 

October ,30,  1917 


Dear  Sir: 

Your  letter  of  0ctober_25.tb'  relative 
to  powder  pellets  is  duly  received.  In  reply  we  wish 
to  state  that  the  largest  pellet  manufactured  by  us 
is  .39  x  1".  We  have  made  a  special  Sphero-Hexagonal 
Pellet  for  use  by  the  U.  S.  Navy  and  could  make  up 
some  of  these  for  you  if  you  so  desire.  We  could 
also  make  pellets  of  the  size  you  request,  but  this 
would  necessitate  the  making  of  dies  and  the  incurring 
or  other  expenses  which  would  total  from  $200  to  $300. 

If  upon  receipt  of  this  letter  you  will 
advise  us  further  as  to  your  wishes,  specifying  if 
possible,  what  granulation  and  pressure  you  desire 
and  what  size,  perforation,  we  will  promptly  furnish 
you  with  the  pellets  required. 

In  the  matter  of  time  detonators  which 
you  refer  to  in  your  postscript,  we  wish  to  advise  that 
we  make  a  great  variety,  and  will  be  pleaseJto  give 
you  all  the  information  possible  if  you  will  kindly 
specify  what  kind  of  detonator  you  wish  to  use. 

Awaiting  you  advloe  in  these  matters, 

we  are 

Very  truly  yours, 


SW&  / 

» mi  3  8  MAIN  ST.  is  A- 

jRANGE,  N.  J. 

id  cjM 

GREENPORT  NY  742PM  OCT  31  1917  - 






Naval  Consulting  Board 
and  Related  Wartime  Research  Papers 
November  1917 


A33  V/  47  COII,  NL 

I  1917  NOV  J  m  2  42 







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9.0  L, _ _ 



10  EAST  43rd  STREET 




Nov.  let .  19X7. 

Mr.  S.  C.  Sbaffner, 

Greenport  House, 

Greenport,  Long  Island. 

Dear  Sir:- 

In  reference  to  the  cable  that  we  dlsoussed  at 
the  factory  on  October  31st.,  we  had  hoped  to  submit  today 
a  proposed  design,  but  in  investigating  the  proposition 
it  oocurred  to  us  that  it  might  be  advantageous  to  prepare 
designs  for  several  types  of  constructions.  This  we  are 
doing,  and  will  be  able  to  submit  within  the  next  two  days 
the  designs  we  have  in  mind. 

In  the  meantime,  we  are  going  ahead  with  the 
manufacture  of  two  or  three  3,100-ft.  lengths,  made  up 
under  each  design.  Your  experimental  work  will  then  show 
which  one  is  the  most  desirable. 

Tie  feel  that  this  is  the  best  policy,  as  it  will 
save  a  maximum  amount  of  time.  At  the  same  time,  we  are 
designing  a  reel  whioh  we  believe  will  be  best  fitted  for 
the  operation  of  this  cable. 

We  have  succeeded  in  getting  the  speoifio  gravity 
quite  low  without  the  use  of  the  silk,  whioh  I  find  is 



Mr.  S-  C.  Shaffner. 

6 ailed  Kopak. 

I  am  personally  looking  into  this  silk  question 
and  know  at  the  present  time  that  I  can  get  the  raw  material 
without  trouble.  In  fact,  I  have  arranged  to  have  a  bale  at 
the  factory  tomorrow  morning.  Whether  I  can  get  the  material 
into  yarn  is  questionable.  This  feature  I  expect  to  run  down 
this  afternoon. 

We  do  know  however,  that  we  can  use  this  silk  for 
filler  in  place  of  jute. 

Mr.  Waterbury  advises  that  we  will  have  the  lengths 
finished  within  a  week,  so  that  you  can  see  we  are  making 
every  effort  to  save  all  the  time  possible. 

We  will  keep  in  close  touoh  with  you  from  day  to 
day,  as  the  work  progresses. 

Yours  very  truly, 


CNoM  S  T  ^ 

Pi  City  I  Chtwcoosj 

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7  NOV  5  AM  9  57 





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10  EAST  43rd  STREET 


2.  3  ^ 


November  5th, 1917. 

Mr.  S.  C.  Sohaffner. 

Dear  Sir:- 

I  am  enclosing  herewith  two  drawings 
showing  the  details  of  the  three  and  four  conductor 
cables  which  we  discussed  this  morning. 

I  am  also  enclosing  a  tracing  showing 
the  general  design  of  the  reel  which  we  propose  to 

One  feature  of  this  drawing  has  not  been 
worked  out,  that  i»>  the  brake.  As  soon  as  this 
feature  is  designed,  we  will  send  you  a  corrected 
traoing  covering  it.  ^ 

If  you  thfrnk  of  any  suggestions  in  con¬ 
nection  with  the  reel,'  kindly  advise. 

I  will  write  you  Wednesday  advising  just 
what  progress  we  axe  making  on  the  cable. 

yours  ve  ry  t  ruly. 

Engineering  Represenlfetive. 

cru7t  (fo 

liovembor  0,1017 .  • 

Groenport  BaDin  &  Construction  Co., 

.  Greenport,  II.Y. 


I  an  making  the  foil  ok  inn  enquiries  of  you 
because  I  understand  you  aro  builders  of  Canal  boats 
and  similar  vessels: 

t  ' 

1.  Would  it  bo  possible  for  you  to  build  a  number 
of  horse-dram  canal  bopis,-  ship  then  in  fcnockod-dov.n 
condition,  and  send  men  and  tools  to  Branco  to  assemble 
them  thero?  " 

B.  '  If  your  answor  is  in  the  affirmative,  can  you 
give  an  approximate  idea  as  to  the  cost  of,  say ,  10,  and 
also  as-  to  the  timo  nithiii  which  they  could  be  furnished 
if  an  ordor  v;ore  given. 

•  Pleuso  address  your  reply  to  Shoe.  h.  Edison, 
cnioof  J.  J.  Butler,  ituvy  Department,  Washington,  D.o.  , 

•  Yours  very  truly. 

Assistant  to.iir.  Edison. 

Offloe  of  Seoretary 

FUNCTION!  Laboratory 

S OBJECT:  Accounting  -  Edison  Personal  (X)  Orders 


Memorandum  No. 

Date  Nov.  6th,  1917 

Mr.  S.  C.  Shaffner 

Mr.  A.  M.  Kennedy: 

Referring  to  Hr.  Shaffner's  conversation  yesterday  re¬ 
garding  the  accounting  for  the  -work  you  are  doing  in  connection 
tfLth  Edison  Personal  (X)  orders,  I  beg  to  say  that  the  manne^of 
sending  in  reports  of  expenses  in  the  past  by  Ur.  Kennedy  have- 
been  quite  satisfactory,  though  perhaps  we  con  set  our  ideas  down 
in  writing  and  put  things  in  a  little  more  business  like  shape. 

This  has  not  been  done  previously  for  the  reason  that  so  many 
neonle  were  handling  the  matter  under  Mr.  Edison's  personal 
direction  and  it  was  felt  impossible  to  do  better  than  we  have 
been  doing. 

At  present  we  have  Mr.  Kennedy  charged  with  §500.00  as  a  fund 
for  use  in  connection  with  any  expenses  he  has  to  incur.  This 
we  are  hondUng  on  the  plan  known  by  the  accountants  as  impressed 
cash.  That  is,  we  are  keeping  this  charge  on  our  books  against 
Mr  Kennedy  crediting  him  with  expenses  he  sends  in  and  reimbursing 
^  imrwdiately0for  sfoh  expenses.  This  leaves  a  charge  of  §500. 
continuously  against  Mr.  Kennedy  which  must  be  accounted  for  at  the 
time  the  work  is  completed,  either  by  properly  approved  expense 
aooount  or  in  cash. 

When  payments  a  receipted  bill  should  be  taken  for 

all  moneys  givenout^  Kding  wages  paid,  and  each  of  “receipts 
Should  show  the  proper  shop  order  to  vfcioh  the  expenses  should  be 

zsxssrfsi  issr 

with  forms  on  which  these  statements  may  be  submitted.  I  am  also 

accounts  as  sent  in  by  you,  statBments  should  bear  the 

d0termiliea  upon* 

I  understood  from  Hr.  Shaffner  that  you  propose  to  keep 

“jits  -sa-i’Ksas  yjK.’SS.-- 

Copies  to«- 


Office  of  Secretary 




Memorandum  No. 

Mr.  S.  C.  Shaffner 

!r.  A.  H.  Kennedy: 

„  ,  deposit  slip  at  the  time  of  mailing  deposit  and  send 

a  duplicate  deposit  slip  ao  on  ^  in  vouohers.  Also,  you 

^nuld  h^vePthe  hank  balLoe  up  your  account  monthly  and  ask  them  to 
^  ®  toreTstaSt  of  the  account  showing  deposits, 
to^  voucherf^d  halves,  which  they  will  mail  direct  to  me. 

You  should  take  the  canoelled  checks  from  the  We  al  after 
verifying  their  balance  send  the  cancelled  oheoks  to  me,  so 
that  my  files  on  the  matter  may  he  complete. 

By  the  observance  of  the  above  few  rules  X  think  we  shall 
he  able  to  keep  our  accounts  together  in  very  nice  shape. 

We  are  handing  you  also  a  supply  of  envelopes  addressed 
to  the  writer  which  you  may  use  in  sending  in  your  vouchers  and 
any  other  communications  you  have. 




Copies  to:- 


November  7,  1917.' 

Ur.  Meadowcroft: 

I  have  requested  a  pass  to  be  issued 
by  the  Hew  York  Hayy  Yard  for  Bruce  li.  Silver. 

I  have  requested  the  Hew  York  Ilavy  . 
Yard  to  cancel  the  oa'33  issued  to  Benj.  Liebowita,  and 
have  .asked  Liebowita  to  return  the  .pass  to  me. 

Iatm,  Ccmswiltmg  Board 


13  Park  Row,  New  York 

Nov.  8,  1917. 

To  the  Members  of  the  Naval  Consulting  Board, 

Dear  Sirs: 

Please  be  advised  that  the  next  meeting  of  the 
Board  v/ill  be  held  at  the  Carnegie  Institution  on  Saturday, 
November  17,  1917. 

The  informal  preliminary  meeting  begins  at  nine 
o'clock,  and  the  regular  meeting  at  ten. 

Very  truly  yours, 

Secretary.  , 


Western  Electric  Company 

19  Greenport  HouBe, 

Greenport,  Long  Island,  H.Y. 

My  dear  Ur.  Shaffner: 

I  am  very  sorry  that  the  two  1000  ohm  receivers 
which  I  sent  you  the  other  day  were  not  what  you  desired. 

I  have  made  inquiry  as  to  what  we  have  in  this  line,  and  I 
learn  that  the  highest  resistance  hand  receivers  made  Ly  us 
are  a  speoial  type  of  450  ohms,  and  any  higher  resistance  re¬ 
ceivers  would  have  to  he  specially  made  on  a  new  design.  It 
would  probably  be  quite  difficult  to  design  a  hand  receiver 
which  would  be  of  the  dimensions  of  our  present  hand  receive] 

and  which  would  at'  the  i 

i  time  have  1000  ohms  : 

with  an  acceptable  efficiency  in  other  respects,  and  also  the 
drawing  up  and  executing  of  such  a  design  would  take  some  oon- 

If  the  450  ohm  hand  receiver  will  meet  your  require¬ 
ments  ,  we  will  send  you  two;  or,  if  you  prefer,  we  will  send  you 
the  1000  ohm  watchcase  receivers  which  you  saw  the  other  day.  . 
Please  let  us  know  what  you  desire. 

We  have  not  yet  been  able  to  get  the  samples  of  the 
reoeiver  mufflers  which  we  had  expected  to  reoeive,  nor  oan 
we  at  present  tell  when  the  manufacturers  will  be  able  to 

Mr.Shaffner  -2- 

deliver  them.  It  seems  that  they  are  both  independent  and 
badly  rushed.  If  you  desire  one  of  the  hoods,  we  can  supply 


_  _ *^}4ujU-  *Lfer?/L  _ 

ht,e>r  S^rJ—  _. 

Western  Electric  Company 



November  12,  1917. 



19  Greenport  House, 

Greenport,  Long  Island,  11. Y. 

My  dear  Mr.  Shaffner: 

We  have  at  last  received  one  of  the  new  forms  of  hood 
of  which  I  was  speaking  to  you:,  and  I  am  sending  it  to  you  hy 
parcel  post.  This  hood,  you  will  notice,  is  in  the  form  of 
a  cape,  and  iB  to  he  used  in  connection  with  the  ordinary  head 
set  with  band,  being  slipped  on  over  the  whole  and  buttoned  as 

I  do  not  know  whether  this  will  meet  your  expecta¬ 
tions  or  requirements,  but  we  have  found  that  it  is  quite  use¬ 
ful  in  eliminating  the  effects  of  wind  end  also  in  largely  re¬ 
ducing  the  effeot  of  extraneous  noises.  Up  to  the  present 
this  is  the  best  we  have  -  in  fact,  it  is  the  only  thing,  with 
the  exception  of  the  hoods  which  you  saw  while  here.  This  . 
particular  cape  has  the  merit  that  it  will  fit  heads  of  a 
variety  of  sizes. 

We  have  not  yet  heard  from  you,  in  reply  to  our 
letter  of  a  few  days  ago  regarding  the  telephone  receivers. 

Submarine  Signal  Company 

I  am  writing  regarding  the  request  you  made  at  our  recent  conference 

for  an  oscillator  which  could  he  varied  from  r.  period  of  2,000  cyoles  to  200 
cycles  and  could  he  hoard  at  a  distance  of  7-1/2  miles.  I  have  conferred  with 
Professor  Fessenden  regarding  your  inquiry  and  he  reports  as  follows 

"1.  2ho  standard  oscillator  will  work,  satisfactorily  for  this  purpose. 

2.  The  cable  used  should  have  its  resistance,  self-induction,  and  capacity 
sufficiently  low  as  not  to  out  down  the  power  to  less  than  00/  of  the  highest 
frequency,  2000. 

The  current  required  will  not  be  morn  than  15  amperes  for  any  frequoncic-s 
roe-aired  and  the  voltage  will  not  exceed  500  volts  for  the  highest  frequency. 

3.  The  amount  of  power  required  will  vary  botween  2  K.W.  for  the  lowest 
frequency  and  4  K.'.V.  for  the  highest.  Consequently  a  5  I:.?,  generator  should  bo 

We  will  sell  the  osoillators  to  you  on  tho  samo  basis  as  we  sell  tho 
United  States  Government,  namely,  03,500.00  for  a  single  oscillator  and  switchboard, 
f.o.b.  Boston,  as  per  Specifications  168E  and  200E  enclosed. 

The  switchboard  shown  in  specification  200E  does  not  take  care  of  the 
variation  in  frequency  which  you  recuire  or  the  amount  of  current  which  might  be 
required  to  operate  the  oscillators  at  a  great  distance  over  cable.  These  changes 


spBaiFiaAsions  luma 

TOR  f'J3B  gffiii  050  ILLAfOR 

fhe  oscillator  168K  is  an  aicctro-magnotic  dotico  capable  of  producing  and 
rocoiving  counrossioual  wavos  in  -water  by  the  vibration  of  a  diaphragm.  Its  best 
efficiency  is  obtained  wi thin  1,'i  of  a  frequency  of  54Q  cycles  per  second. 

'file  oscillator  is  hermetically  sealed  and  shipped  v/ith  -an  internal  air  prosouro 
of  twonty-fivo  (25)  pounds  per  square  inch. 

file  oscillator  hue  been  designed  so  that  it  may  be  raised  and  lowered  in  a  tube 
installed  in  the  button  of  a  ship,  fhe  tube  and  necessary  apparatus  for  raising  and 
levering  the  oscillator  arc  to  be  provided  by  the  customer. 


Diameter  of  diaphragm  twenty-four  and  one-quarter  iuclios  (24  l/4") 

Depth  of  oscillator  approximately  twonty-four  inches  (24") 

./eight  pf  oscillator  approximately  twelve  hundred  (1200)  pounds. 


fhe  oscillator  is  shipped  with  fifteen  (la)  foot  of  four  (4)  conductor  cable 
attached  inside  and  brought  out  through  a  viator-tight  paoidng.  fhe  two  amaller  con¬ 
ductors  are  attache  a  to  the  field  winding  and  tuc  two  larger  conductors  are  attached  to 
the  armature  winding'. 

RE.:3f?.nbiL  diuuoiiiaiBgio 

Field-  fhe  field  coil  has  a  resintanoe  of  from  twenty-seven  (27)  to  thirty  (50) 
ohms  at  seventy  (70)  dogroeos  Farenhoit  and  can  bo  separately  excited  by  from  ninety 
(90)  to  one  hnndrod  and  fifty  (150)  volts  direct  current. 


Elio  armature  winding- has  a  resistance  to  direct  current  of  from  4.15  to  4.55 
ohms  at  70°  F. 



a  uioncy  of  five  hundrod 
tui-o  draws  a 

V/I1011  sending 

300 onil  t::o  oscillator  awton  draws  an  altonaUns  current 
eleven  (11)  aonoroa  at  one  Hurdro.  aid  oi^Uty  (120)  volts 
dii-oot  of  ap:,roxi:.utoly  3-l/2  aumcros. 

I.;  j L.'.'-io.,  RddiciiVi-.cai 

forty  (:;40)  cyclos  tor 
to  ly 
iold  coil 

23 io;tio;i  rox 
)  t.drd  (1/3)  laocolca  o 
one  Half  (1/2)  Hoar. 

all  ean-yina  P 
or  tiiO  oacillutor  ins  u 

ttaoiiod  print  163a. 


July  2,  191V 





-  '  ?OT.T..aS  90  -ISO  -  5_K^. 


This  switchboard  has  been  designed  to  support  tho  apparatus  nooos3  ry 
control  the  operation  of  nn  oscillator  installation  consisting  of  ono  (l)  oscillator, a  4 
H.P. remote  control  motor  starter,  and  a  5  *.*.  motor  generator. 


Tho  panel  is  mado  of  ebony  asheotoB  mounted  on  angle  irons. 

Upon  this  panel  are  mounted: 

One  (1)  oscillator  field  line  switch. 

One  (1)  oscillator  field  discharge  switch. 

Ono  (1)  motor  line  switch. 

a  send  to  receive. 

)  Mounted 
)  concentrically 

One  (l)  starter  control  switch. 

One  (1)  switch  for  changing  froi 
Ono  (l)  A.C.  voltmeter. 

Ono  (1)  A.C.  ammeter. 

Ono  (1)  frequency  motor. 

One  Cl)  generator  field  rheosts 
One  (1)  motor  field  circuit. 

Six  (6)  fuses. 

Ono  (l)  enclosed  sending  hoy. 

One  (1)  double  head  telephone  receiver  with  cord. 

0*0  l2)  resistsncee  for  oscillator  field  discharge  switch. 
One  (l)  D.O.  ammeter. 

Two  (2)  bihding  poste  for  telephone  receiver  cords. 
Sixteen  (16)  terminal  studs  and  lugs. 

Necessary  wire. 



Horae  Plate. 

Trade  Iferk. 

All  atuds  and  pinned  and  all  nuts  are  held  in  place  with  lock  nuts. 

All  live  metal  parts  are  copper  plated  and  lacnuerod. 

All  opposed  mot-,1  parts  are  painted  with  a  black  durable  material  to  prevent  corrot 


All  switches  are  enclosed  by  metal  covers  which  are  suitably  marked 
the  U3e  of  the  switches. 


The  motor  and  generator  field  rheostats  aro  mounted  concentrically  i 
frame  on  the  back  of  the  panel.  Tho  control  handles  are  in  front  and  plainly  i 
show  the  effect  of  their  operation. 

a  rigid 
[•lead  to 



used  are  of 

enclosed  cartridge  type  held  in  standard  clips,  and 

consist  of 

too  (2)  fuses  for  oscillator  armature  circuit  15  amperes, 

too  (2)  fuses  for  oscillator  field  circuit  6  amperes, 

too  (2)  fusos  for  motor  line  circuit  10°  amperes. 


The  telephone  receivero  are  oft  the  double  head  series  typo  with  adjustable 
head  band  and  five  feot  of  silk  covered  cord.  The  resistance  of  these  receivers  is 

ten  (lo)  ohms, 

■rtbistahck  uaii-s 

The  two  (2)  resistance  units  are  placod  across  the  oscillator  field  discharge 
switch  to  absorb  the  inductive  kick. 


AH  wiring  is  done  in  accordance  with  the  wiring  diagram  forming  a  portion 
of  these  specifications. 


lu  pairs  of  terminals  have  namo  plates  to  correspond  with  the  trlrlms  UW™- 

a,  «»  .»i*i  — «  «  “•  ■”"1?  vol“0*'  “* 

the  size  of  the  motor  gonor'.tor  with  which  it  is  to  he  used. 

The  overall  dimensions  are 

17"  wide  X  48"  higji  and  14-5/8”  deep. 

The  weight  complete  is  approximately  200  pounds. 


This  switchboard  is  shown  on  Print  Ho-  200  E. 

The  completed  switchboard  is  tested  for  circuits  by  operating  t 
of  a  complete  installation. 

The  insulation  resistance  is  measured  from  all  current  carrying 
ground.  A  resistance  of  75,000  ohms  or  hotter  is  required. 

July  2,  1917 
CPC/K  /T 

liovernbeJ  1-1,1917 . 

Lieut.  0.  II.  Varley, 

Kloctric  13oat  Go.-, 
itUincy,  I.  jus  a. 

yjf  flour  Cir:- 

heforriny  to  my  lottor  of  tho  7th 
tuifl  your  teloyrura  of  yoatorfluy’a  flu  to. 

Ur.  V.urnor  uflviooc  it  v:uc  hia  oririnal 
in  tout  ion,  or  thought,  to  come  up  to  your  Git;,  v.ith 
hia  Detector  for  an  actual  trial  in  a  Gubnurino 
anfl  that- ho  ori-efl  in  aohinr  you  to  come  dov.n  here. 

.  He  novi  v.ichcc  mo  to  v.rito  and  ool.-  you 
~hon  ho  nay  como  up  to  sec  you.  proparod  for  an 
actual  tout. 

If- you  v.iah  to  reply  by  telcf-run,  may  X. 
ash  that  you  afltrese-  sumo  to  ue  ss  our  riant  hero 
io  oxtrcr.ioly  larro  ana  v-c  desire  to  hoop  tho  matter 
under  cover  ac  much  ac  postiblo.  iiiic  sufpostion 
is  nafle  for  obvious ; roaconc . 

'Jhanhinf  you  for  your  cooperation,  1  remain. 
Yours  very  tru'ly. 

acsis -ant  to  Ur.  iii-icou. 


Labe ra.i~^r  y  °  f 

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Mr.  William  Meadowcroft, 

Room  502,  Navy  Annex, 

Washington,  D.  C. 

Dear  Sir: 

Attached  herewith  is  a  list  giving  you  a  few  par¬ 
ticulars  regarding  the  average  freight  steamer  now  running 
across  the  western  ocean.  This  I  trust  will  he  the  infor¬ 

mation  you  desire. 

Yours  truly, 


3V  CC - 

WASHINGTON  DC  122^  NOV  20  1917 






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‘T- . TfT 

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165NY  GC  r£ikRANGEV  N.  J. 

GREENPORT  NY  NOV  21  1917 











,  ... 


November  22,  1917 


Messrs.  Blynn  &  OneriaE, 

805  U.  Holliday  Street, 

Baltimore,  Maryland. 


We  are  requested  to  send  you  order  for  100 
castings  ordered  by  Mr.  B.  H.  Silver  and  for  miscellaneous  small 
castings  which  Mr.  Silver  may  order  from  time  to  time.  You 
will  find  enclosed  our  purchased  order  #102370  -  requisition  2725, 
which  please  use  as  your  authority  for  billing,  rendering  bills 
as  instructed  on  the  purohase  order  form. 

Yours  very  truly, 

- - 

Seoretary.  ^ 



Messrs.  Headoworoft  t  Silver 

Ilovembor  £4,  1017. 

ilr.  Edison: 

I  am  sending  herewith  two  letters  for  yon 
to  sign,  one  of  thorn  is  for  Secretary  Bakor  and  the'  othor 
is  to  be  sir-nod  by  you  and  roturnod  to  me .  . 

I  would  suggest  that  you  send  I!r .  Hanford 
over  to-  socrotary  Bakor’s  office  with  his  lot  tor,  and 
soo  hr.  Bailor’s  private  socretary  and  ash  iiim  to  see 
that  the  matter  receives  prompt  attention. 

fhoodoro  and  .-arnei  want  the  other  letter 
to  carry  around  with  .thorn  so  that  thoy  can  socure  :*uick 
attention  at  various  places  where  they  may  want  to  get 
a  small  amount  of  work  done  or  procure  some  material. 

llovombe'r  L4.1917. 

30  V.HOU  13  UbX  COBCiiu! : 

.ShiB  io-to  certify  that  sheodorc  it-. 

Edison  and  a.  G.  h&rnor'aro  v.orkinr-  v.ith  me  on  cone 
spocial  experiments;  for  the  Unitod  htateo  Government, 
in  v.hi'ch  there  should  he  no  delay. 

Anythinp  that  cun  ho  done  to  expedite 
their  v.ork,  by  furnishing  materials  or  labor,  v;ill  bo 
of  proat  service  and  much  appreciated. 




34  November  1917. 

Mr.  Thomas  A.  Edison, 

Edison  laboratory. 
Orange,  H.  3. 

My  dear  Mir.  Edison:- 

I  believe  you  will  remember  that  when  in 
New  London  a  couple  of  months  ago  you  desired  to  have_ 
made  some  tests  using  Whitehead  Torpedoes  (Brotherhood 
Engined) .  We  obtained  two  such  torpedoes  ±rom  the 
Torpedo  Station  at  Newport  and  have  been  holding  them 
here  at  New  London  waiting  on  word  from  you  as  to  when 
you  wanted  the  test  conducted.  As  the  Torpedo  Station 
at  Newport  would  be  glad  to  get  these  torpedoes  back, 

I  am  writing  to  find  out  if  you  still  desire  to  conduct 
test  using  these  torpedoes  or  if  you  have  made  other 
arrangements;  in  the  latter  case  I  will  have  these 
torpedoes  returned  to  Newport. 

Very  sincerely. 

’JJf’a.t  I'll/.  {J]po2c>w&nct.p- .  _ 

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orange:,  N.  J. 

63NY.H  16 

MA  WASHINGTON  D  C  1118  AM  NOV  26-17 




llovember  20,1917. 

I  received  your  telegram  about  Steel  bool 
looked  up  the  matter  immediately.  I  telephoned  to 
American  Steel  tool  I.lfg.  Co.,  Inc.,  at  401  Greenwich 
Street,  lieu  York,  and  found  that  I  could  get  a  fow  pounds 
right  away,  and  arranged  to  send  the  boy  in  for  four 
pounds  of  their  finest  grado,  also  samples  of  their  other 
grades.  This  will  be  sent  to  you  by  Parcel  Post  -  Special 
Delivery  today. 

They  told  mo  they  made  several  other  grades 
and  would  put  in  samples.  -hey  charge  90 4  per'pound 
for  the  finest  grade,  but  said  that  in  larger  quantities 
they  would  quote  prices. 

She  following  is  a  list  of  the  concerns  making 

Jas.  II.  Hhodes  a"  Co.,  167  V/.  Austin  avq . ,  Chicago, Ill. 
Ihurston  «  Co.,  1834  S.  Clark  St.,  Chicago,  Ill. 

C.  1.  Chase  &  Son,  Leominster,  Uass. 

Hanson,  Southbridge,  Liass. 
lerican  Steel  Wool  Hfg.  Co., Inc. ,451  Greenwich  St.  ,1! .'I. City . 
3uhne  Steel  wool  Co.,  93  llassau  Street,  Hew  York,  11. 1. 
I.lalcolm  King,  Inc.,  173  Pearl  Street,  Hew  York,  H.Y. 

Jas.  H.  Bhodes  &  Co.,lG2  William  Street,  Hew  York,  H.Y. 
Kidgely  Trimmer  Co.,  Springfield,  Ohio. 

Spaulding  ’£  lletculf,  632  Arch  Street,  Philadelphia,  Pa. 

Tip  Top  Hail  Co.,  1410  Washington  .ivo . ,  Philadelphia,  Pa. 

If  I  knew  what  quantities  you  are  contemplating, 
I  would  have  written  a  letter  to  all  of  the  above  concerns 
asking  for  samples  and  prices,  but  am  afraid  they  will  not 
quote  unless  they  are  told  what  quantity  you  will  want.  If 
you  want  me  to  write  to  all  of  them,  please  let  me  know  the 
quantities  upon  which  you  wish  them  to  quote. 

Yours  very  truly, 

'  II ov ember  26 , 1917  . 

Dear  Hr .  Edison: 

Hr.  nnver  wants  to  got  some  more  GO;j  Oleum, 
ana  I  am  having  quite  a  hurd  time  about  it.  She  Express  Companies 
will  only  take  one  pound  in  a  single  package.  we  had  five 
gallons  in  a  steel  drum  already  to  ship,  but  the  Express  Company 
will  not  take  it  even  for  Government  purposes.  r  am,  there¬ 
fore,  obliged  to  send  it  down  to  the  Sachem  by  freight,  and 
have  marked  it  "Hush.  Government  Work".  ■ 

'i’hese  five  gallons,  of  course ,  will  probably  not  reach 
the  Sachem  until  towards  the  end  of  the  week.  I  realized 
that  von  will  want  a  considerably  larger  quantity,  so  I  tele¬ 
phoned  to  one  of  by  friends  in  the  General  Chemical  Co.  and 
asked  him  to  ship  a  CO  gallon  drum  down  to  Annapolis. 

Ho  said  he  would  try  and  get  it  off  today,  but  this 
afternoon  he  culled  me  on  the  ’phone  and  said  sheir  little  60,, 
Oleum  plant  was  undergoing  repairs  union  would  not  be  completed 
until  the  end  of  the  week  or  the  beginning  of  next  week. 

He  said  they  had  on  hand  and  could  ship  immediately 
two  arums  of  64‘/3  Oleum,  and  I  said  I  would  let  you  know  about 
it  and  ask  you. 

'therefore,  the  matter  stands  thus: 

I  have  shipped  five  gallons  of  the  60;.  by  freight. 
We  can  get  60  gallons  more  of  the  60;j  in  the  beginning  of  next 

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/j-<  SiA^-cc^sh-  slur  . 

Naval  Consulting  Board 


Nov.  B6,  1917. 

To  the  Members  of  the  Haval  Consulting  Board, 

Dear  Sirs: 

It  is  desired  to  obtain  passes  for  the  Members  of 
the  Board,  to  give  then  access  to  the  public  buildings  in 
Washington.  As  each  pass  must  contain  a  photograph  of  the 
member  to  whom  issued  will  you  kindly  send  to  this  office  a 
photograph,  if  possible  similar  to  those  used  for  the  IJavy 
Yard  passes. 

As  the  printing  of  these  passes  cannot  be  started 
until  all  photographs  are  in  hand,  may  I  have  yours  at  the 
earliest  convenient  date. 

Very  truly  yours, 


Naval  Consulting  Board 


13  Park  Row,  New  York 

Nov.  26,  1317. 

To  the  Members  of  the  Naval  Consulting  Board, 
Dear  Sirs: 

Please  be  advised  that  the  next  meeting  of  the 
Naval  Consulting  Board  tfill  be  held  on  December  8,  1917, 
in  the  Carnegie  Institution,  Washington,  D.  C. 

The  preliminary  meeting  begins  at  nine  o'clock, 
and  the  formal  meeting  at  ten. 

Very  truly  yourG, 




liov .  £7,19X7  . 

Dear  Hr,  Batson:  -•  .  . 

We  are  in  n  very  bad  position  in  repaid 
to  nn<ooti  for  i’rod  Ott,  Silver,  and  Vrooland.  Eho  passes 
"hich  thcy  huvo  hue .  which  wore  issued  by  the  Brooklyn^ 

Ilavy  Yard,  aro  absolutely  of  no  uco  and  will  not  admit 
thorn  in  any  other  llavy  Yard  or  on  Government  property  -nd 

Silver  has  had . a  great  deal  of  trouble  coming 
and  to  the  Sachem.  .  Bred  Ott  and  Vrooland  were 
hold  up  by  Sentries  two  jiiphts  aro,  and  when  ^niorim  went 
down  to  the  boat  for'  you  his  Ilavy  pass  would  not  take  him 
fihnn.rd  and  they  sent  a'Guard  on  to  tne  boat  v.ith  him. 

This  condition  of  affairs  is  going  to  make  Rouble  sooner  or 
later,  as  our  men  are  liablo  to  be  hold  up  a^  suspicious 
persons,  and  possibly  arrestod. 

I  would  suggost  that-  you  send  the  enclosed  letter 
over  to  Docrotary 'Daniels ,  who  will  probably  arrange  to  have  - 
some  special  form  of  pas a  iscuod  forjrur  men.  bimilar  passes 
shouldPalso  bo  issued 'for  yourself,  -'Jiiorim  and  l.ol.o. 

I  have  also  hoard  from  Silver  something  about 
a  nornit  boin-  roouired  to  have  explosives  in  one’s  possession. 

,  LPoux  poopWon  the  Scchora  will  probably  hnvo 
small  ouantitios  of  oxplosivo  material  from  time  to  timo, 
wo  ought  to  provide  for  this,  in  tho  passes. 

X  .therefore,  have  drawn  •up  a  let tor  addressed 

to  Secretary  Daniels.  If  you  approve,  will  you  jleaso.  sign  ^ 
it  and  lot  nr..  Hanford,  take  it  over  to- tho  Secretary  c  oxfice. 

'  •  -  Yours  very  truly,' 

llovembor  27,1917. 

Hon.  Josophus  Baniols,. 

fho.  Socrotury  of  tho  Uavy,. 

iiashington,  D.  C..  dear .  Daniels: 

Until  quite  recently  ny  men  have 
had  no  trouble  in  going  frooly  to  and  from  the  Cuohcm 
by  showing  tho  paseoe  that  were  issued  to  thorn  some¬ 
time  ago  from  the  Brooklyn  Ilavy  Yard. 

iiinco  the  voosol  has  been  at  Annapolis,  how¬ 
ever,  thoy  have  had  more  or  lees  trouble,  and  aro  told 
that  .the  Brooklyn. liavy  Yard  paesoo  aro.  not  of  no  use. 
Sometimes  my  men  have  considerable  difficulty  potting 
back  to  the-  boat  if  they  have  boon  ashoro.  This,  of 
course,  might'  assume  a  Serious  aspect  at  any  moment,  • 
and  I  am  afruid  that  sooner  or  liitor  it  is  going  to  iritor-. 
fore  with  ray  work.  Besides,  my  men  aro  getting  a  little 
restive  at  being  looked  upon  and  treated  with  suspicion. 

Can  thoro  not  bo  issued  somo  special  form  of 
passes  which  will  onablo  ray  men  to  go  to  and  from  tno 
Cachorai  (B.PJ9&  )  and  Chicota,  (S.P.6S).  "ho  pamos  of 
my  men  aro  as  follows : 

Frederick  P.  Qtt,  •  , 

■  ■  Bruce  E.  Silver, 

'  Chorlos  Vrooland,  • 

T.illiam  II.  Knierim, 

'  • .  H.  G.  I.olfe, 

and,  1  . suppose,  ono  should  bo  iscuod  td  myself. 

'fhoro  is  another  thing  that  should  bo  mentioned.. 
I-undorclahd  that  it  is  a  ruthor  soriouB  offense  to  have  ■ 
explosives-  in  ono's  possession  on  Gotrorruaont  property .  as 
you, are  awaro ;  X  urn  Btill  exporimontdng  on  ,^0  srooko-bonb  _ 
and  under -wortor^ pro joctidLe.  and  sometimos  it  may  ho  necessary 

for  ray  raon  po  go  aBhqrc'una  buy  u  little  ponder  or  2.11.2. 
for  those  cxpci iraonte .  Hot:  can  no  provide  for  this? 

Yours  very  truly. 

116  v. 


Ur.  A.  1.1.  Eonnody,  ' 

Yacht  "hampnnt", 

Jacob' a  Shipyard, 

City  Island,  II.  Y. 

Dear  llr.  Kennedy: 

ihio  will  introduco  to  you  Ur.  V.'il'llan 
Bo-no ,  who  has  boon  pith  us  a  little  tino  experimenting 
on  some  Government  work  for  Ur.  Edison.  I  havo  just 
rocoived  a  note  this  morning  from  Ur.  Edison  aching  me 
to  sond  Ur.  Bouns  down  to  you  so  that  you  and  Ur.  B.ooi  o 
can  give  him  Bono  information  about  audione  and  micro¬ 
phones.  Ur.  Beans  will  oxulnin  to  yon  the  work 
ho  is  on  and  I  v.6uld-asl:  that  you  kindly  give  him  such 
information  as  hd  deciroc.  . 

■  .  Yours  very  truly. 

insistent  to  Ur.  Edison. 

ivJLCT^  * 


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Naval  Consulting  Board 
and  Related  Wartime  Research  Papers 
December  1917 

Dec.  1,1917. 

General  Chomical  Co.,- 
25  Broad  Stroot, 

'  '  llow  York,  II. Y. 

Gentleman:  Attontion  iir.  Hawkos; 

Ilorovtith  I  hand  yon  our  Purchase  Order  Ho. 
142570",  for  one  damn  of  6 OjJ  Oleum,  to  be  Shipped  in 
accordance  with  instruction  on  the  order. 

In  our  telephone  conversation  the  other  day 
you  stated  that  the  GO}j  ^>lant  would  be  in  operation 
apain  tho  beginning  of  tho  coming  wool:,  and  I  trust 
that  you  will  kindly  have  this  drum  forwarded  at  your 
earliest  convoniencjo.  '  . 

Yours  vory  truly, 

Assistant  to  Hr.  Hdison. 


ilnclosuro . 

December  3,1917. 

iir.  Yhomns  hobins,  Joe., 

llaval  Consulting  Board , 

13  Dark  I.ov, , 

Dor.  York,  li.Y. 

Dear  Mr.  hobins; 

In  accordance  with  your  favor  of  the 
aGth  ultimo  on  tho  subject  of  obtaining  paccoscfor 
the  Belabors:  of  tho  Board,  to  give  them  accost  to 
the  public,  build ingc  in  hashing ton,  I  am  solid  inp 
you  herewith  two  photograph  of  hr.  helicon,  similar 
to  thoed  ueod  for  tho  ilavylYardtpasceo. 

Yours  vory  truly,  . 

Assistant  to  iir.  iidison. 




December  5, 


.  Ur.  Thomas  A.  Edison, 

llaval  Consulting  Board, 
l’avy  Annex, 

Washington,  3.  ( 

1$/  dear  Ur.  Edison: 

Confirming  ray  telephoned  advices  to  your  office  this  a 
I  beg  to  advise  you  of  tho  receipt  of  a  report  from  tno  Ame 
Consul  at  Tampico,  Mexico,  to  the  following  effect: 

The  total  clearances  of  vessels  carrying  oil  for 
all  destinations  during  the  months  July,  August,  and 
September  were  as  follows: 

At  the  request  of  your  assistant,  I  have  requested  a  further 
rooort  from  tho  Consul .of  the  number  of  clearances  from  Tampico  and 
Tuxpom  for  Puerto  Mexico. 

If  the  above  information  is  inadequate  in  any  respect,  will 
you  kindly  advise  ne  so  that  I  may  arrange  to  supplement  it. 

Very  truly  yours. 

Assistant  to  Chief  of  Bureau. 


Department  of  Commerce 


Decomber  3,  1917. 

Ur.  Thomas  A.  Edison, 

Haval  Consulting  Board, 
Washington,  D.  C. 

Dear  Hr.  Edison:  _  _  _ 

. I  inclose  herewith  a  statement  showing  the  number  of  vessols 
arrived  at  ports  of  the  United  States  with  Mexican  oil  during  July, 
August,  Septerabor,  and  October  of  this  year.  Reports  from  the 
collectors  of  customs  at  Hew  York  and  Philadelphia  have  not  been  re¬ 
ceived  yet,  but  will  be  transmitted  as  soon  as  available.  Without 
theso  two  districts,  the  number  of  oil-carrying  vessels  amounted  to 
62  during  July,  65  in  August,  65  in  September,  and  76  in  October. 

The  number  of  vessels  cleared  with  Mexican  oil  amounted  to  6  in 
July,  28  in  August,  19  in  September, and  21  in  October,  all  to  England 
with  the  exception  of  6  to  France,  15  to  Scotland,  and  4  to  Ireland, 
as  noted  on  the  statement.  These  clearances  were  reported  from  the 
ports  of  Norfolk,  Newport  Hews,  and  Hew  Orleans  only.  The  Collector 
of  Customs  at  Baltimore  states  that  the  liexioan  oil  is  delivered  to  a 
refinery  and  none  exported.  Galveston  states  that  no  Mexican  oil  is 
exported,  but  that  some  is  sold  as  fuel  oil  after  having  been  run 
through  a  refinery  in  this  country  and  thereafter  is  considered  as 
domestic  oil. 

There  were  no  exports  o 
from  the  Pacific  Coast  ports 
hope  to  be  able  tomorrow  to 
tonnage  of  vessels  clearing 

f  domestic  miheral  oil  in  reoent  months 
through  the  Panama  Canal  to  Europe.  X 
furnish  you  some  data  on  the  number  and 
coastwise  between  ports  in  the  United 

Yours  very  truly. 

Assistant  to  the 
Chief  of  Bureau. 

Inolosure  1963. 

Department  of  Commerce 


4,  1917. 

.'x.  Thomas  A.  Edison, 

Naval  Consulting  Board, 
Viashington,  D.  C. 

Doar  Sir: 

Viith  further  reforenoo  to  my  letter  of  yesterday,  the  collector 
of  customs  at  New  York  reports  the  arrival  of  vessol3  with  Mexican 
oil  as  follows: 

New  York  Perth  Amboy  Newark 
July  14  22 

August  15  31 

September  9  3  1 

October  -12  2  0 

Philadelphia  reports  the  following  arrivals  of  vessels  with 

Mexican  oil:  Ho.  of  vessels 

July  2 

August  2 

October  4 

July  1  arrived  at  Wilmington. 

No  exports  of  Mexican  oil  are  reported  from  these  two  districts. 

I  enolose  herewith  a  statement  showing  the  clearances  of  vossols 
at  Atlantic  and  Gulf  ports  in  tho  domestic  trade  coastwise. 

The  report  from  tho  collector  at  Baltimore  has  not  been  received 
and  will  be  transmitted  as  soon  as  it  comes  in. 

Chief  of  Bureau. 

Inclosuro  5057.3 





,  Thomas  i.  Edison, 

Washington ,  D.C. 

I  was  out  today  with  the  SACHS.,  for  tuning  trial 
inclosed  plesse  find  copies  of  data  on  same. 

s.v  ing 

Trial  ii.  Ship  heading  east,  11  knots  speed  help 
,  port!  interval  of  time  46  seconds,  making  90  de„r-es 
ship  heading  south. 

Trial  #2.  Ship  heading  east  helm  hard^to^port,^ 

•  „„ i.  on  depress  4:6  ssconcLs,  130  de.-n66^»,  ^ 

decrees?  W6  seconds,  560  degrees,  176  seconds,  -^mes  at 
ll°lcnots  speed  during  entire  circuit. 

T^ial  45.  Shin  heading  east,  11  knots  speed,  helm 
hard  to  port,  90  degrees  swing,  52  seconds. 

?46  Ilconds,  slo  degrees,  172  seconds. 

.  --  -.codin'-  =ast ,  sueed  11  knots,  first 

„  le.r..rg  SAnSf 94  -  2" 

i46  llconds,  560  degrees,  172  seconds. 

Triai  #6.  Ship  heading  west,  speed^l-^kno^  ^  se00nds, 

rorL*?=f.far»;oSS?'Sh?“Sh»y  .W  Aopp.d,  hpadinp 


Trial  s=7 .  Ship  heading  east ,  speed  ll^nots^heto 

IrLSe^^^S^c^r^rSst-Iost^adway,  when  headed 

2X&  tO 

Trial  #8.  .Ship' headed  east,  speed  11  knots  helm  ha 
oort  and  engines  reversed  full  speed  astern,  snip  s  he  act  & 
o^de^rees  to  east  southeast,  and  Headway  shopped.  .1  ;~avily 
loaded” cargo  vessel  under  similar  conditions  of  forthelmand 
reversed  engines  would  swing  in  a  greater  arch  and  carry  her 
head'vav  ">uch  --reater  distance,  this  applies  to  single  screw 
vessels.  From^time  engine  reversed  to  headway  stopped,  60  seconds. 

Trial  #9.  Ship  headed  east,  speed  11  knots,  helm  hard  to 
Starboard  a£d  engines  reversed  full  speed  astern  ship's  head 
3„jTLn°.  to  east  northeast,  or  S3  degrees  oefore  snip  -  headway 

similar^onditions/vessel  woSd\ave  a  " 

^£se05re^st^eah^naSoPveLe^  a?f SoS  to^mted 
with  right  hand  propellers;  left  hand  propellers  giving  opposite 
results . 

Trial  #10.  Shio  headed  east,  speed  11  knots,  first  90 
decrees  46  seconds,  5.80  degrees,  87  seconds,  270  degrees,  1^7 
seconds,  360  degrees,  180  degrees. 

Trial  411.  Ship  headed  we st,  speed  11  knots  9?47 

ship  swung  about  50  feet  inside  of  starting  buoy. 

2.  Am  enclosing  pencils  sketches  of  above. 

Yours  very  truly 

1%  Qsjx^~ 

Lieutenant,  U.  3.0. 3.3?. 





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ITovombcr  30,  191V 

Hr.  'fhomas  A.  Edison 
Edison  Laboratory 
Llewellyn  Park 
Grango,  How  Jersey 

Hoar  l!r.  Edison: 

You  may  be  interested  to  know  that  tho  Edison  system  of 
o::poriraouting  has  once  moro  proved  its  value  and  that  tho  successful 
method  of  detecting  submarines  was  worked  out  by  the  methods  which 
you  taught  me  in  your  Laoorat  ory,  1806-1(390 . 

I  enclose  couios  of  reports  of  two  official  tests  i.ovcmbor 
14th  and  15th  which  will  interest  you. 

'fho  apparatus  should  have  been  installou  and  put  in 
operation  on  all  destroyers  and  submarines  early  last  'lay,  but  I 
had  a  Ions  fight  with  tho  Board  to  got  it  tried.  I  gave  successful 
demonstrations  in  April  at  lew  London  and  host on  up  to  five  miles 
but  when  tho  Board  was  appointed  they  first  ordered  sim  sets  to 
bo  installed  according  to  thoir  own  ideas  and  in  a  way  viiich  I  told 
them  would  not  work;  thon  they  took  away  tho  boat  which  Admiral  Grant 
had  arranged  X  should  have  to  do  experimenting  work  with;  aim.  thon 
wrote  me  June  10th  to  stop  all  work  on  attempting  to  locato  submarines 
from  a  moving  vessel.  I  was  always  very  polito  to  tacm  because  X 
did  not  wish  to  givo  them  any  chanco  ut  me,  but  kept  on  with  tho 
work,  whereupon  they  blocked  mo  in  getting  tho  apparatus  I  noodod. 
However,  I  went  ahead  and, by  the  help  of  Admiral  Griffin  and  Captain 
Leigh,  got  a  boat  for  throo  or  four  day'3  and  made  another  danonsv, ration 
Soptcmber  15th. 

1'his  showed  we  could  detect  the  submarino  all  right  up)  to 
distances  of  seven  miles,  but  owing  -  as  wo  afterwards  found  -  to  two 
of  tho  sound  screens  having  boon  made  up  cheaply  with  galvanised 
iron  and  tho  .oil  wo  iking  in  so  they  no  longor  screened  tho  sound, 
we  got  tho  direction  all  right  but  ran  past  the  submarines,  not  bolng 


able  to  toll  whether  they  wore  dead  ahead  or  astern. 

'./lion  wo  triod  to  sot  anothor  test  with  proper  sound 
soroons  the  Board  turned  ua  dov/n,  stating  that  they  did  not  consider 
the  method  sufficiently  promising  to  warrant  further  toots. 

Vie  tiien  wont  down  to  ITev;  London  and  arrangod  to  put  the 
apparatus  in  at  ova*  own  er.ponso  and  after  considerably  delay,  owing 
to  the  fact  t.sat  the  Board  Was  dry  docicing  tlio  AYIA7I1!  to  install 
some  ideas  of  their  own  on  hor,  wo  got  our  apparatus  installed 
novel  iber  dth.  fflicy  then  tool;  the  ouhtarino  away  again  and  wo  had 
to  worl:  with  Admiral  Griffin  and  Captain  Leigh  to  got  a  submarine. 

_YL  ;H7  away  aid  I  was  only  able  to  get  them  to  leave  the  boat  over 
for  a  day  to  give  us  a  chance  to  test  the  a  go.ratus  by  tolling  them 
very  oolitely  and  with  all  possible  courtesy  that  if  the  boat  left 
X  should  consider  it  my  duty  to  publish  the  entire  correspondence, 
otc.  in  regard  to  the  natter.  3o  on  the  13th  wo  had  both  the  AXIA/IL 
and  a  submarine  and  on  the  14th  and  15th  wo  made  the  too  tests 
of  which  I  enclose  copios  and  cliarts. 

As  you  will  see  they  were  very  successful  and  on  the  second 
day  wo  wore  on  top  of  the  submarine  aid  nau  reported  ready  to  bomb 
nine  minutes  after  the  drop  of  the  iiandkorchief  • 

Pile  Board  tool:  tho  boat  awoy  from  us  on  the  16th  and  what 
thoy  imvo  boon  do  ing  sinoo  I  do  not  know. 

1’ho  officers  of  tho  boat  wore  very  anxious  to  lcavo  at 
onoo  for  tho  other  side  and  Captain  Leigh  was  vary  anxious  to  have 
tho  Al'Xi'./ET  ovor  by  tlio  time  i.o  got  aoros3,  but  I  understand  the  Board 
intends  to  hold  the  AiLY/Iii  hc-re  for  a  month,  however,  in  view  of 
tho  reports  and  charts,  shoving  how  the  thing  actually  works,  X  do 
not  think  they  will  bo  able  to  block  things  much  longer. 


She  croat  pity  of  tiio  whole  thins  i»  thit  the  apparatus 
midht  have  boon  installed  on  all  destroyers  eonmneins  loot  hay 
and  submarine  warfare  »i^t  hy  this  ti*o  have  boon  a  thins  of  the 

I  would  lido  very  Much  to  huvo 

suiting  you  sometime  as  to  how  the  above 

an  opportunity  of  con¬ 
sort  of  thing  can  be 

orevonted.  If  our  democracy  is  to  win  out,  as  I  bc.iove  - 

and  should,  vrs  must  evolve  efficient  -.jays  oi  WoritAng.  I 
tho^  ^  ^  ^ 

of  administration  and  execution.  I  wish  you  could  see  y u 
clear  to  talcing  up  sane  of  the  so  questions  ana  solving  tn< 

;  will 

If  this  invention  could  bo  dedicated,  as  a  painting  or 

„  .  it  to  --ou  as  tho  castor  who  taught 

a  bool:,  I  snoula  lino  «o  aeeicat/t  n 

mo  oraotioally  everything  I  Tmow  about  onuorimontlng.  ;.s  it  is 
I  can  only  thanl:  you,  and  remain 

Sincerely  and  respectfully  yours. 

Sports  iros.  117  &  118 


n.  a.  Fonoondoa 

hctom  awamaa  v.okk 

flovgfnbor  go.  19UI.  3ute.rinp_aigi.V^. .  P°  t,  BuJaZ.  ' 

jt,  Ohaso  of  liovorabor  14th.  aubrnorino  G-l  obaaod  by  dostroyor  AVL'VIH. 
na  int.  2ho  oil  piping  of  tho  XEiflVH  was  oompiotod  liovorabor  Oth  tat  no  sub- 
morlnoB  vroro  available,  tho  h  bouts  having  boonsont  to  How  London  and  tho  0-1, 

Y,hioh  arrivoft  "hursduy,  being  found  to  have  ono  omataro  loose  on  tho  shaft. 

fly  trashing:  the  writ  night  on!  day,  mo  Heins  tho  non  thm  shifts,  and. 
personally  saparvislng,  every  aosistanoo  being  furnished  by  Commandant  iluah 
and  tho  yard  force.  Captain  i’hotnaa  of  tho  0-1  was  able  to  looato  tho  trouble, 
rctnovo  tho  old  motor  couplings,  oto.,  got  a  no"f  arxitaro  from  Jon  Yorl£*  sx& 
havo  ovorythins  in  vOaoo  so  tho  first  tost  could  bo  nado  Hovombor  14th. 

It  v;oo  arranged  to  mako  two  tests  on  November  14  th  - 

(a)  Standardising  tost  for  dlvootlon  aid  adjustment 

(b)  Submarine  ohaso 

_  jv|r.v.i  oT  fle* 

'  ■ 

On  sulin&mlng  it  ><£sT  i’ouncT'tott 

(  ^  -i  -  *•  *L'o  (tn lioii 

chaoLed  test  could  bo  c: 



course  Jmorn  fco  tho  offloom  of  tho  :*LV;III  hut  not  icnom  to  the  tabnflrlno 
operator.  Eho  AXWKin  ms  to  allow  the  outamlno  to  got  a  nilo  start  aid  thon 
ohaso  tar. 

Slunk  print  lio.  3003-11-11,  attuohod,  oliowoi 

1.  Cho  oo-aroo  of  tlio  AH.17XH  plotted  by  r.iout.  Pulwar,  shown  by 
full  wavy  lino. 

2.  iSho  oourso  it  had  botasrrangod  tho  submarine  should  telco, 
shorn  by  straight  dotted  lino. 

3.  i’ho  oourso  viiiioh  tho  sutaarlno  actually  did  toko,  plotted  by 
Liout.  Palmar.  All  obsorvationo  o..oopt  tho  loot  ono  being 
plotted  frem  observations  roportod  by  oitamiino  oporatorj 

tho  last  point  plotted  from  tho  position  at  vhioh  tho  submarine 
n  tho  surface. 

Bio  dootroyor  nas  otcorod  according  to  tho  dlrcotion3 
tho  submarine  operator,  tho  submarine  oporator  notifying  Limit.  pcla<st'  o£ 


tha  position  of  tho  submarine.  For  oxamplo,  at  10-B2  tho  submarine  operator 
notified  Liout,  Palmer  that  the  submarine  was  on  the  port  quarter  and  obent 
one-half  mile  distant. 

Almost  Immediately  aftor  starting  tho  AYLY/I il  the  otoraarlne  was 
hoard  on  the  port  bow  about  a  mile  distant.  She  AYLY/IH  ran  there  and  the 
submarine  was  then  reported  about  one-quarter  milo  distent  on  the  port  boom. 

Cho  rudder  of  the  AYLY/IH  woe  then  put  to  tho  loft  and  the  AYLY/IH  olroled 
for  six  minutes.  During  all  this  time  tho  submarine  v/aa  found  to  bo  on  the 
port  bona,  this  being  actually  the  oaae  for  tho  reason  that  tho  AYLY/IiT  ms 
turning  in  a  oirolo  with  the  subnarino  practically  as  a  oonter.  ffliis  nuusled 
tho  operator,  who  ashed  that  tho  boat  bo  stoppod.  Immodiattiy  tho  order  hod 
boon  given  tho  operator  reported  that  tho  submarine  waspassing  under  tho  atom 
of  tho  ship  and  fron  port  to  starboard  aid  oloso  enough  to  berab,  and  a  oouplo 
of  minutes  lator,  10-48*  reported  tho  submarine  on  the  starboard  quarter  and 
ono-h^kf Tniie  "awh^.  Tho  A,3 A/m  star 
o'olo  ih  £■ 
the  oxer1 
i’ho  dost 

oporator  reported  tho  submarine  20°  on  tho  port  bow,  ono-quartor  of  a  mllo  away. 
Oio  AYLY/IH  thon  ran  forward  a  little  ovor  a  quarter  of  a  mile,  Loading  towards 
tho  submarine  and  at  11-26  tho  oporator  roportod  that  ho  was  on  top  of  tho 
submarine  and  in  position  for  bombing. 

As  tho  submarine  should  havo  boon  approximately  a  milo  away  and 
45°  to  port,  tod  it  followed  tho  oourso  laid  out,  tho  oporator  was  thought, 
by  tho  bridge,  to  bo  wrong  and  ho  thoroforo  ashed  tho  captain  of  tho  AYLY/IH 
to  listen  in  and  verify  tho  foots  himsolf.  Captain  Lo  Breton  listened  In  end 
hoard  tho  submarine  and  a  fow  sooonds  lator,  tho  AYLY/IH  still  drifting  along  on 
top  of  too  oUbmarlno,  tho  submarine  was  hoard  to  ring  liar  boll  and  blow  her  air 
whistle.  21io  captain  ms  immediately  notiflod  that  tho  submarine  was  ooming  to 
tho  surface  and  eras  passing  from  tho  port  to  tho  starboard  side.  Captain  Lo 
Breton  tanodiatoly  throw  tho  ruddor  to  loft  and  started  up  too  engines  in  suoh 
a  way  as  to  stop  too  drifting  and  swing  toe  boat  so  as  to  oloar  tho  submarine, 
and  on  going  to  tho  side  too  air  bubblos  from  too  submarine’s  whlotlo  \i 
soon  to  bo  rising  Just  oloar  of  too  oldo  of  tho  ohip  to  starboard,  too  submarine 


117  -  3 

having  boon  directly  under  the  kWOB  and  a  oorloua  aooldonb  only  avoided 
by  tho  prompt  notion  of  tho  ouptain  in  liandlla.j  tho  XUXiXK  oo  us  to  oloar 
tho  mdaurino  •  A  for w  sooonds  later  the  porisaopo  of  tho  submarine  oamo  to 
tho  surface  • 

It  will  "do  noted  that  tho  actual  oourao  of  tho  submarine,  no  shown 
by  tho  observations  plotted  fror.  tho  submarine  operator's  reports,  bonds  oon- 
sldorably  to  tho  right  of  tho  straight  lino  shaving  tho  oouroo  viiiah  the  sub¬ 
marine  was  supposed  to  havo  tolcon.  Mils  bonding-  was  probably  duo  to  tho  strong 
tido  carrying  tho .  submarine  over  to  -tho  left,  l'hiu  fact,  however,  could  not  bo 
Known  from  tho  JCtL\OS  as  the  drag  attached  to  tho  suhoarlno  bed.  boon  pullod 
under  tho  water  hTnouiately  on  the  sutaarino  starting  up,  so  that  the  only 

S  «he  submarine's  position  was  that  dorivod  from  tho  observations 
of  tho  submarine  operator#  and  for  tho  last  position  from  the  point  at  which 
tho  sulmarlno  rose  to  tho  sarfooo. 

siUittji  is  o/llj 
;•  arrSl 

nn-„-,.,-rir<n  flag  ahead  or  astern  and  oonoonuently  thy  ostvoycr  would 
run  past  tho  subsmrlno  «£  away  iron  it  until,  tho  sound  growing  faint,  tho 
mlBtuXo  v/as  realised  asd  tho  boat  turned, 
present  four  osoillator  arrengemunt. 

l’o  llluotrato  this  it  is  inatraotlvo  to  compat 
toot  of  lioptctcbor  15th,  using  two  oscillabora,  with  the 
llovembor  14th,  using  four  osoillators.  In 
nftor  running  about  a  mile,  as  on 

satliwly  ovoroano  with  tho 

oevparo  the  chart  of  tho 

■t  of  tho  tout  of 
ease  tho  uvtaarino  was  locutod, 
port  sido  and  a  littlo  lator,  at  1-00  in 

tho  tost  of  doptembor  16th  end  10-40  In  tho  tost  of  ilovoribor  Bth,  ns  being 
oboan  on  tho  port  sido.  But  whereas  in  tho  tost  of  September  16th  tho  AffllB 
turned  a  oomploto  oirolo  end  at  1-20  ran  dlreotly  awey  from  tho  aubmarlno  undor 
tho  Impression  that  tbo  submarine  was  ahoed  whereas  oho  was  really  dead  astern 
end  so  lost  the  submarine,  on  tho  toot  of  Kovembor  3Ath  tho  AYLWIH  only  turnod 
half  a  oomploto  oirolo  and  thon  locating  the  submarine  as  bolus  dlreotly  astom 
turned  tho  halm  again  to  tho  right  end  followed  her  and  ran  her  down  and  got  on 
top  of  her  in  position  fbr  bombing  at  11-26. 


On  aooount  of  the  fact  that  tills  v:ao  tho  flrot  teat  made  with 
tho  arparatuo  It  was  flftoan  mimtoa  from  tho  ocniraonoomont  of  tho  teat 
before  the  AYLV/IH  got  Into  position  for  bombing  the  first  tino  at  10-45 
and  on  aooount  of  tho  time  tatan  in  mating  tho  throe  turns  it  toot  forty 
minutoa  to  got  into  position  to  bomb  tho  sooond  time.  Uhls  length  of  tlmo 
was  largely  due  to  lnoxporience  and  an  the  ajiperatus  worts  with  absolute 
certainty  and  reliability  it  ia  inoroly  a  quostlon  of  a  littlo  praotloo  to 
roduoe  the  length  of  time. 

Broadly  speaking,  tills  tost  showod  tho  apparatus  to  bo  entirely 



A.  A»  I'ooaendan 

Sub.joott-  Uutoarilno  Cliano  of  liovorabcr  10th,  Sulmr-rluo  0-1  ohtisoA  by  AUv.'IH, 
M  int.  t!hls  oliaao  vraa  oubotnntlDlly  tho  oa/.o  ;a  that  of  ’/ovcrabor  ldth 
o;;oopb  that  tho  aitairino,  liaviuf;  sutacrgod  about  r.  nllo  and  a  liolf  array, 
wao  InotruoboO  to  ran  on  uiioiam  and  vmytna  courcoa  and  endeavor  to  cludo 
tho  /AX, 'HI,  tho  AX', IlJ  In  tho  .:osn05iao  o«loc,vorin£;  to  get  in  position  on  top 
of  her  for  bombing, 

Vho  only  pointn  to  noto  In  thlo  toot  aro : 

1,  That  nino  ralmtoo  after  tho  drop  of  tho  liandlsorahiof  tho 
/JXiTIlT,  running  at  ID  laiotc,  was  on  top  of  tho  and  'reported  in 
pooition  for  boabins,  at  11-07, 

2,.  flint  tho  oubsaerino  nover  ran  oil  a  straight  oourso  for 

up  again  rfion  alia  rang  her  boll  for  tho  cosplotioa  of  tho  Seat, 


V3icu  cooing  up  to  tho  subnarlno  a  spool  of  ID  lalo  to  -;ao  found 
to  bo  cuito  oatlofcntoty,  but  20  laioto  would.  'probably  have  boon  all  right. 
After  coming  up  to  tho  oubr.iarluo  a  opcou  of  10  hnoto  quoecu  to 

bo  fairly  oattiafaotory  but  rouoltod  oooasionally  In  ovor-runnlng,  On 
oooount  of  tho  over-running  at  11-20  tho  Captain  viaa  aoiood  to  olov;  tho  ohlp 
dotm  to  6  teaoto,  V.hllo  tlioorotlcolly  tlilo  ohould  havo  boon  a  good  apt®!,  it 
woo  fount  In  practice  to  be  too  Blow  on  oooount  of  tho  loos  of  timo  In 
tumo,  end  conoocraontly  during  tho  nnst  bnonty  minutos,  from  11—29  to  11—09, 

tho  AflWIH,  while  following  the  oubmrino  with  perfect  aoouraoy,  Old  not  got 
on  top  of  hor, 

foosibly  a  oiwod  of  0  iaioto  would  lmvo  boon  oatiBfaotory,  but  It 
lo  more  proboblo  that  tlio  rulo  ohould  bo  no  followsj 


110  -  2 

Han  at  IB  to  20  Knots  viion  3/4  of  a  rallo  anay 

Hun  at  10  icnotoa  nhon  botwoon  l/4  and  3/4  of  a  milo  aooy. 

glow  dorm  to  0  Hnofca  when  rplthin  l/4  of  a  rallo* 


Shot  tho  ralo  laid  down  In  a  prcwloao  report  that  tho 
flinflanontol  and  oufflolont  mosno  for  dootroyins  oubmarlnoB  lo  vonsolo: 
equipped  with  apparatun  oapdble  of  hearing  subnminao  while  traveling 
at  a  opood  faator  than  the  outaarlna  lo  proven  oorroot. 

That  tho  prooont  atparatuo  Mcorrollnho3  thin  and  lo  entirely 
oatiofaotory  for  praotloal  worn  ond  oan,  and  ohould  ho,  lnatallod  an 
foot  ao  poaoiblo  on  all  dootroyoro  and  oil  largo  voooolo  ongrgod  In  ,onb- 

Dcconbor  £*,1917. 

Dr.  Aefinald  A.  i'oEGonden, 

10E  i’rnnklin  htroet, 
Joe  ton,  iitiBC. 

Dour  Dr.  i’eusoadon: 

lour  favor  of  tho  50th  ultimo 
to  lir.  Edison,  and- ale o  ronorts  Log.  117  and  110 
and  two  charts  havo  boon  rcccivod  only  this  norn- 
inp . 

hr.  Edison  has  been  .in  V.ashinpton  for 
tho  last  tv.o  mouths ,  and  I  an  forwarding  to  hin 
this  iioon,  by  Epocial  Delivery,  all  tho  papers  above 
ref  or  ret  to..  1  an  sure  ho  would  bo  vary  rlud 
to  pot  then  and  will  bo  proatly  intoroatod. 

I  Vi  tic  s-orhijif  T.ith  hi'  i  down  in,  \,ashinpton 
for  about  Eix  wools,  but  my  part  of  tho  worl:  be inf 
finished  I  have  rcturnod  to  tho  laboratory. 

bhilo  I  havo  not  coon  you  for  about  £0 
yoars ,  I  have  boon  hoarinp  about  you  and  your  v.orh 
with  a  preat  deal  of  ploncuro. 

i.ith  irind  repaid e,  X  remain, 

'fours  vor-y  truly. 

Assistant  to  ilr.  Edison. 


Doc.  G,1917 . 

Captain  l..  Strothor  bnith,  U.  S.  H., 

Davy  Donurtmcnt, 

bosh lug ton,  D.  C. 

Dear  Captain  Enith: 

As  you  know,  our  Laboratory  bills; 
for  cost  of  Hr.  Edison's  oxporimcnts  for  the  Government 
havo  in  tho  pact  indicates  not  only  our  Laboratory  chop 
order  numbeis,  but' also  the  nature  of  tho  experiments 
covered  by  such  order  numbers. 

.  V.c  bo vo  boon  thinking  that  if  tlioro  should  bo 
a  miscarriage  in  the  mailE  soiaotimo,  through  which  one 
of  those  bills  should  ro  astray,  it  nipht  in  cortain 
circumstances  be  oubai rase inn. 

'fhorcforc ,  X  v.rito  to  make  the-  surpestion 
that  horesfter  our  bills  should  noroly  indicate  tho  Lab¬ 
oratory  sliop-order  numbers  and  not  make  any  mention  of 
tho  subject.  Of  course,  v.o  would  furnisli  you  v.itl:  i. 
key  of  tho  nnt.ii  e  of  tho  exphrimontc  t.:  which  tho  ordor 
numhorc  refer. 

V. ill  this  bo  aprooable  and  satisfactory  to 
tho  Department? 

Y0urc  very  truly. 


Ur.  Edison. 

CD&*  IjUa-  „  _ 

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Washington,  d.  c.  December  7th  1917. 

Mr.  Thomas  A.  Edison, 
ilavy  Building, 
Washington,!).  G. 

Dear  Sir: 

In  our  conference  of  December  5th,  you 
mentioned  several  times  the  liquid  60f;  Oleum.  V/e 
are  planning  a  set  of  comparative  experiments 
which  will  include  the  detonation  of  various 
strengths  of  Oleum  ranging  from  66  Be0  Sulphuric 
Acid,  from  that  to  straight  S03. 

We  have  no  liquid  Oqeum  of  the  strength 
you  mentioned  and  should  lilce  to  include  this  in 
the  series.  Would  you  provide  \is  with  10  or  12 
pounds  of  this  material? 

Chemical  Engineer. 

In  Charge  of 
Pyrotechnic  Div. 

o,  <^haajiA/v  t\,  cY3omAq.  <Yx  fy 

^  y\H  P'7 

""VWV  A  -A?  AXvxxMil^^ 

Yvujp^c^  JLA_ 

4  £/7<>\AJUAJu|l  AJIaAJU,  OuLiL^ 


IC*A/lIuA  CLAAcl^fc^r" 

V^tr^VQ-A^w^vvCA  ^WV^\WlBJtuA  UWUA  AA01> 
^C^yvAJlA-(J^QjU  ^ 

'■Vus^x^  -wu/fL  A^elib^Q.c!^  Axw^aji  Q\  IV 

OuQ  Am  C^VVXM^AA^QpJuC^  % 

xXX\,  CX^VlA.  \~hx7iA^JUU  /t^IiUiUAAY  ClaacL 

\A^4  AL^m,  JS~P  .  A-o^v&j^  . 

iH~curt _ R^A-^eict  VV^f 

^^axJLL  S^virs-usvvjl^  vjuXvsal  x^ 




V  Hr.  HICOL, 

Director  of  Marine  (transport  Service, 


Mr.  (thorns  A.  Edison, 

General  Board, 

Navy  Annex, 

Hew  Xoric  Avenue  &  18th  St., 


My  desr  Mr.  Edison  : 

In  compliance  with  your  request,  I  beg  to  give 
you  hereunder  particulars  relating  to  various  French  ports  on  the 
Atlantic  Coast  : 

OROZON  .-  Only  port  where  ships  having  4  neters' 
draught  can  land  on  distance  of  100  meters  during  one  hour  at  every 
tide.  N0  stock  of  toold. 

DOPARHENBZ.—  Her  at  Port  Rhu,  may  he  landed  230 
meters  during  two  hours  each  tide,  at  high  tide,  by  ships  pulling 
three  meters.  Ho  stock  of  toold.  Access  difficult  at  night.  Night 
work  may  be  organized. 

OONOARNEAP  .-  Same  caraoteristios  as  DOUARNENEZ. 
length  of  Wharves  120  meters. 

IiORIENg  .-  Floating  dock  accessible  two  hours  and  a 
half  each  tide  for  ships  drawing  4  to  5  meters.  Nine  oranes.  Electric 
limiting  at  wharves.  Easy  access  at  night. 

FORI-IOUIS  .-  Accessible  at  each  tide  for  three  hours  by 
ships  pulling  three  meters, 20.  (Two  stations,.  No  Btook  of  tools. 

No  possible  work  nor  access  at  night. 

-  2  - 

QUIHEROH.-  Depth  of  port  Im,20.  Ho  stodc  of  tools.  Easy  access. 

EES  s ABIES  .-  Floating  dock  for  four  ships.  Accessible  to  ships 
drawing  3,50  to  4  meters, during  two  hours.  Six  orones.  Accessible 
by  night.  Hi£it  work  may  be  organized. 

RCfYAN  .-  1°.-  landing-place  iray  in  general  receive  at  ary  tide 
time  ships  drawing  3  meters.  Qno  station  only. 

2°.-  Stranding  port  ;  ships  drawing  3  to  4  meters  water 
may  be  reoeived  during  two  hours  each  tide.  Ho  stock  of  tools.  No  night 

EE  VEHDOH.  -  Ho  port.  Roadstead  only.  Depth  of  12  meters  at  low 
tide.  Ho  stock  of  tools.  Access  of  roadstead  possible  at  night. 

AR0A0H0H.-  landing-place  with  3,50  to  4  meters  of  water  at 
low-water  mark  ;  operations  made  principally  on  roadstead  of  dock  by 
ships  of  4  to  4,60  meters.  Ho  stock  of  tools.  Ho  access  nor  unloading  at 


Apart  from  lorient  and  Ies  Sables  d*01onne  which  are  conmerciaL 
ports  of  very  little  importance ,  all  the  ports  hereinabovar  mentioned  are 
only  small  fishing  ports. 

You  have  also  asked  me  which  are  the  conditions  of  navigable¬ 
ness  of  the  Canal  du  Midi.  I  beg  to  inform  you  that  I'  have  received 
infonnation  from  Paris  that  in  the  Canal  du  Hidi  can  navigate  pinnaces 
of  7.50  meters  wide,  30  meters  long,  and  of  1,60  meter  sea-gauge. 

Eras  ting  that  these  infonnation  will  prove  satisfactory, 

I  beg  to  remain,  my  dear  Kr.  Edison, 


Yours  faithfully. 

Dec.  0,1917 . 

Dr.  iVoginald  A.  Fessenden, 

105  Franklin  htroot, 

■-  Boston,  tiles. 

:.:y  dour  Dr.  Fessenden: 

-hat  was  a  nighty  kind  note 
.you  wrote  mo  on  the  Gtlx  instant,  and  it  was  veri- 
much  appreciated.  X  have  not  seen  you  for  c.  long 
time,- but  would  eor,tainl.v  liko  to  soa  you  again,,  and 
if  ever  I  got  over  to  3oeton  it  will  give  me  a  great 
deal  of  ploacui o  to.  accept  your  3:ind  invitation  to 
take  dinner  with  you. 

Vihon  you  coo  the  enclosure  in  this  letter, 
it  will  remind -you  of  olcl  times.  I  guess  you  Iiave 
had  lots  of  poncil  memoranda  from,  the  "Old  iian".  it 
pooo  without  saying  that  hie  first  paragraph  is  more 
or  lose  confidential. 

j.s  I  diotato,  it  occurs  to  me  that  the 
socond  paragraph  will  have  the  effect  of  producing 
a  desire  on  your  part  to  have  a  poraohul  talk  with 
him,  so  I  am  going  to  anticipate  with  a  littlo  explan¬ 

where  is  not  tho  slightest  doubt  in  ay  mind 
that  ho  would  bo  .awfully  glad  to  huvo  a  talk  with  you. 
Just  now  he  is  down  in  Washington  on  some  very  spoeiul 
work.  V.e  wont  down  on  October  9th,  and  I  cone  back 
on  liovomber  51st,  loaving -him  there -ho  secretary 
of  tho  Davy  pavo  him  tho  uso  of  tho  lato  admiral  Dewey 
room  In  tho.  iiavy  Annex,  at.  Washington.  who  iiavy  Anno 
is  loci.  ted.  on  ilew  fork  ^vonub  and  10th  Otreot.  If 
you  lump  on  to  be  going  down  to  Washington  you  could 
sec  him  thorc  by  Bonding  up  your  nano.  Of  course,  it 
will  bo  quite  obvious  to  you  that  I  only  toll  a  few 
ehoioo  porsons  how  to  roach  him.  '. 

i'ron  v.hat  I  ]mov;  nov. ,  ho  is  pro tty  suro 
to  be  dov;n  there  Tor  anotlioi  v.ook  and  possibly  a 
little  longer , so  if  you  bhould  be  going  dov.n  you 
had  bettor  holograph  ahead,  addressing  your  tolo- 
grarn 'Ehonas  a  •  iidisoir,  c/o  J •  J«  Butlor  •  luivy  Juinei 
lashing  ton,  3j*  C. 

V.ith  hind  rounds','  I  remain, 

.  .  Yours  ainoeroly. 

assistant  to  i.Sr".  iidison. 

line  lo  suro  .. 


Deo.  10,  1917. 

Lieut. Comdr.  C .S.LIcDowell 
U.S.IIaval  Station, 

Ilew  London, 


Dear  Sir; 

Referring  to  your  letter  of  Hoy.  24  with  regard  to 
two  V.hitehead  torpedoos  (  Brotherhood  engined  )  X  can  advise 
that  I  do  not  need  thorn  at  present,  d'ho  rough  weather  at  Ilew 
London  and  Montauk  Point  has  forced  me  to  transfer  my  experi¬ 
mentation  to  the  Chosapeake  whore  we  aro  now  located.  I  intend 
to  go  to  Hey  Vest,  Florida,  soon,  where  I  understand  two 
Submarines  are  located.  In  a  few  months  I  expect  to  be  in  a 
position  to  use  thoso  V.hitehead  torpedoes.  In  the  moantimr, 
you  can  make  whatever  disposition  piJuthon  you  see  fit.  Please, 
however,  understand  that  I  still  intend  to  make  use  of  them 
when  conditions  pormit. 

Very  sincerely  yours, 


Deo.  10,  1917. 

Roan  Admiral  G.E.Burd 
Industrial  Manager 
Brooklyn  Havy  Yard. 

Bear  Sir; 

Some  time  ago  General  Crozlor  let  mo  have  a  3"  field 
piece  which  is  now  located  at  tho  Brooklyn  Ilavy  Yard.  I  have 
detailed  lieutenant  J.H.  l’atton,  tho  hearer  of  thiB  letter, 
to  make  arrangements  to  transport  the  gun  to  Annapolis  wherd 
my  boat  tho  U.S.S. sachem  is  now  located.  lieutenant  Patton 
is  the  commanding  officer  of  the  Sachem. 

'.'.'ill  you.  theregor,  kindly  deliver  the  field  pince 

to  him. 

Very  sincerely  yours. 

December  10,  1917 

Ur.  S.  0.  Shaf  flier, 
c/o  U.  S.  S.  Sachem, 
S.  P.  192, 

Annapolis,  lid. 

Enclosed  ^Mf^two  typewritten  copies  of  packing 
list  of  materials  and  equipment  which  you  had  shipped  from  the 
Laboratory  on  the  8th  inst.  1  have  retained  copy  in  this 
office  so  that  we  may  make  check  against  the  list  upon  the  re¬ 
turn  of  the  goods  to  the  Laboratory. 




Packing  Case  (Trunk  1 

4  Bolls  of  tape 
4  Butter  air  cushions 

1  Weston  Hilliammeter  direct  ourrent  Model  1  Ho.  3733 
6  Eveready  tungsten  tatteries  Ho.  703 

1  Kheostat  Sliding 

Butter  tuting  -  large  and  small 

2  Condensers  2  M.F.  each 

6  Double  throw  double  pole  porcelain  tase  knife  switches 

4  Single  "  "  "  "  "  "  " 

2  "  "  one  "  "  "  n  " 

1  Model  280  Ho.  30566  Weston  Volt  and  Ammeter 

2  Yards  of  insulating  material 
33  Single  Fahnstocks  dips 

20  Double  M  " 

-it  Box  insulating  staples 
1  Boll  silk  taffeta  3/8  wide  7  meters  long 
1  T.  A.  E.  Inc.  Ampmeter  15  scale 

1  Boll  Western  Electric  Bosin  core  solder 
W.  E.  Betardation  coil  Ho.  D29578 

9  Oz.  24in.  wide  Quta  Percha 

2  Oz.  Dry  Shellac 

1  Qt.  can  Gutta  Percha  solution  thinned  with  Benzol 
1  Box  assorted  screws  -  trass 

1  Audion  bulb  base 

1  Tin  Funnel 

1  Box  rubber  bladders 
1  Aviators  Helmet 

1  Small  box  with  screws  and  metal  covers  for  models 

5  Bell  Transmitters 

1  Piece  of  lead 

1  Battery  filler  gass 

1  Can  Bubber  cement 

2  Ear  mufflers 

2  Acme  note  books 

1  W.  E.  Eleotrioal  supply  year  book 
1  Bottle  Benzol 

1  V/.  E.  Telephone  book 

1  letter  File 

Bell  Diaphragms 

1  Wheatstone  Bridge  (Laboratory  property) 

1  Stop  watch 

1  Paul  galvanometer  (personal  property  of  Mr.  Edison) 

2  Thompson  levering  shunt  line  boxes 

2  Sets  Holtzer-Cabot  head  receivers  3000  ohms 


5  Bell  receivers 

2  »  "  with  resonators  attached 

2  Bell  carbon  transmitters 
1  W.  E.  carbon  miorophone  transmitter 
E  W.  E.  watch  case  receivers 

1  Single  head  band  test  receiver 

2  Audion  test  plugs,  with  flexible  wire 

1  Bed  blanket  (used  for  packing) 

4  Extra  Bell  receiver  caps 
1  300  lb.  ioe  spring  scale 

1  Porcelain  base  rheostat 

2  Extra  Bell  receiver  shells  with  caps 

1  »  »  >•  oap 

1  Specially  wound  Bell  receiver 

1  Four  stage  Audion  in  sheet  iron  case 
1  One  "  "  "  "  "  " 

1  Bell  in  Bheet  metal  case 
4  2  Lb.  boxes  of  black  wax 

3  Large  writing  pads 

1  Acme  note  book 

3  sheets  of  rubber 


Packing  Case 
1  Klaxon,  sound  box 


Single  stage  Audion 
Vtype  Audion  bulbs 



Packing  Case 

104  118  Edison  Storage  Batteries 

Packing  .Case 

4  Batteries  of  5  cells  20  D.  4  Storage  Batteries 



B.  4  Storage  Batteries  5  cells  eaoh  10  cells 
B.  2  "5  '•  "  10  .  " 

20  " 

Packing  Case  (Trunk) 

2  V  type  Audion  bulbs 

2  L  "  "  " 

2  Lbs  Bees  Wax 

2  »  Bosln 

1  Gasoline  torch 

1  Ball  twine 

1  Doz.  sheets  emery  doth 

1  Edison  microphone  (Koore) 

1  Bell  "  transmitter 

1  Tail  section  of  6  ft.  model 
1  "  "  "  3  "  " 

1  Special  high  res.  transmitter 
1  100  ft.  roll  of  rubber  covered  wire 

3  Sticks  of  Chattertons  oompound 

1  Soldering  iron 

1  Wood  clamp 


1  Sq.  ft.  .0135"  Russian  sheet  iron 
1  ><  »  .019"  »  "  " 

8  Yds  oheese  cloth 

100  Feet  of  cotton  braided  rubber  covered  oode  wire 
50  "  11  "  sash  cord  3/8" 

1  Pair  rubbers  (Hanley) 

1  Tool  box  (Hanley) 

1  Pair  shoes  (Hanley) 

1  Bag  clothes  (Uoore) 

6  Sheets  sand  paper 

12  Binding  post  screws 

1  Bottle  Vaseline 

1  Box  carpet  tacks 

1  Bottle  shellac 

1  Suit  clothes  (lloore) 

1  500  ft.  roll  of  Pot  Head  #19  wire 

1  Reel  with  cranks  and  brake 
1  2100  feet  of  cork  covered  cable 

1  Stand  for  Reel  Ho.  9 

1  1  -  26"  Reel  2500  feet  Army  field  wire 


1  6  ft.  model 



Packing  Case 

1  3/4  of  a  6"  model 

1  l/4  front  seotlon  of  3'  model 

Packing  Case 
104  HQ  Cells 

1  6  foot  model 


1  Reel  and  strand 

Mr.  Moore's  tool  box 


1  Cruit 

1  Lathe  -  foot  power 



1  Reel  and. stand 


1  1  -  26" 

1  Box  and  small  copper  model 

J.  Burns'  clothes 
1  Microphone 

Mr.  Moore's  suit  case 




lOCCKUi.l’  10,  I’. 





l\  , 

a‘“  * 

Iftison  -3 

to  a  mlsunderotandins  0.3  to  tuo  tino  the  chaso 

Sincerely  and  roa.iootl'ully  youi’a. 

QX.  v 


n.  A.  Fesaondon 

3ept,  19.  1917 

Submarlno  Signal  Oo.  Ho.  109 

Awnondlg  C_ 

Sub  .loot  i  Finally  Standardised  'fypo  A  Installation  Fousondon  Commutator 
Submarine  Dotootor 

She  apparatus  oompriooo  tho  following  olanontss 
A*  Four  standard  oscillators* 

2o  bo  locatod  in  oil  tonics,  as  shown  bluo  print  30Q3-K-8 
B.  Standard  switchboard  with  following  i.ndificationaj 

1*  Field  switches  arranged  to  throw  on  four  fields  instead  of  two* 
2*  Two  double  polo  doublo  Uiror;  owitohos  for  throwing  on  any 

pair  of  osoillators  to  port  and  starboard  owitohos 
3.  Switch  for  charging  from  Bonding  to  receiving  is  omittod 

C.  Operator’s  singlo  throw  swltoh  for  throwing  absorption  coils  off  oscillator 

1.  3onding  or  rooalving  oulinary  oubmarino  telograph  mossegos 
And  for  tlirowing  absorption  coils  on  when: 

1*  Lintonlng  in  for  submarines 

2*  Sending  or  resolving  by  soorot  sonding  method 

3*  Using  ooolllator  for  submarine  tolonhony 

D.  Operator’s  doublo  throw  swltoh  lbr  throwing  ooolllator  armature 
oirouita  to  switohboard  for  sonding  or  to  operator’s  tolophono  for 
receiving.  Switch  outside  operator's  booth,  handle  inside. 

E.  Operator’s  four  polo  rotating  ovdtoh  for  throwing  in  any  pair  of 
osoillators  for  listening. 

F.  Double  commutator.  Typo  4.  (I. a.  oamo  site  as  proBont  singlo  ocranutator 

with  oldos  brought  up  so  as  to  feral  iron  box  with  hlngod  lid  of  wiro 
glass.  V/eathor  proof  motor.)  Shis  ocranutator  to  bo  outoido  operator's 


Appendix  0-2 

Rheostat  for  regulating  a  pood  of  double  commutator.  Ehoostat  to  bo 

H.  Two  polo  doublo  throw  a  wit  oh  for  cutting  out  commutator. 

I.  Two  oinglo  stage  ampllfloro. 

Tho  oharaotoriotios  of  those  amplifiers  to  bo  boot  adapted, 
for  uoo  with  tolaphono  roooivoro  liaviog  tho  same  offootivo 
irapodanoo  as  tho  ooolllatoro,  i.o.  about  15  ohms  at  1000  froquonoy. 

J.  12  volt  o tor ago  battorlos  for  amplifiers 

1C.  Doublo  pole  doublo  throw  switohoa  for  outtins  out  emolifior . 

rocoiver)  Each  oar  pleoo  to  ba  oonnootod  t 

ooolllator,  i.o.  about  15  ohms  at  1000  froquonoy. 
Telephone  switch  for  throwing  olther  oar  oiooo  on 

TJootor'for  tost  ing'^oimutatqr,  oomiEising  dr^-coll,  l5p0-blmo  fj/:ed/ 

- — >  \  / —  \  i — \  \  \  \  /  7 

ro3iol|an<jo,  low  'ariabl  i  nsiatonao, doublii  tltrow  owitxrti  £oj  / 
oonnaoting  to  o  .th  ir  oiroi  At  at  poi  it  botwoon^onnnitator  akd  oaOillat 
Wirinfj  bJtweon  iso  .llator  i,  iwitoht  oarli,  andopoiv. tor's  tabjlo.j 

i  in  spparato  lobd  tovored 

r  armored  cable.  The  loads  from  t 

lot  bo  armored  unloss  thought  advisable. 

Oporators’s  booth  should  ba 

or  if  inside  thoro  should  be  a  door  covered  with 
sheet  ooppor  which  oan  bo  swung  shut  so  as  to  hoop 

out  all  olovtroBtatio  offoots  s 

Thoro  should  bo  two  sound  serosas,  as  shown  in  drawing  3005-11-8, 
ono  tranovoroo  and  ono  foroond  aft.  Those  should  bo  according  to 
specifications  fumiohod  by  hr.  Williams. 



Appendix  0-3  |; 

R.  Blue  prints  and.  dlrootlonn  for  operatise 

1.  Bluo  prlnt3  of  oonnootiono 

2.  Dlrootlonn  for  oporating 

Pap  of  Appai-atUfl, 

2hls  apparatus  may  be  usod  In  the  following  ways: 

1.  For  liotonlng  in  for  submarines  with  dostroyor  stationary 
but  auxiliary  maohinory  running 

a*  Rood vers  oonneotod  dlrootly  bo  osoillatoro 
without  conmutator  or  amplifior  by  throwing 
switchoo  H  and  K.  Rango  ono-half  to  ono  rallo. 
b.  Hoooivors  oonnootod  to  osoillator  Tilth  omplifior 
By  throwing  awltdh  H.  Hango  from  ono  railo  to 
two  miles. 

o.  Receivers  oonnootod  to  oomnutatov  and  osoillatoro 

2*  For  listening  in  for  submarines  with  dostroyor  running  at 
S  to  10  knots  and  auxiliary  maohinory  running. 

U,  Reoo Ivors  oonnootod  dlrootly  to  osoillators  without 
ooimutayor  or  nmplifior  by  throwing  svrbichoo  H  and 
K.  Range  400  yards 

b.  Roooivora  oonnootod  to  osoillatoro  with  amplifier. 

By  throwing  switch  II.  Range  800  yardo 
o.  Reoeivers  oonneotod  io  commutator  and  osoillators. 

By  throwing  switch  K.  Range  4  miles, 
d.  Reoolvors  oonnootod  to  amplifier,  commutator,  and 
osoillators.  Range  not  known, 

3,  For  listening  for  submarines  with  dostroyor  running  at  20 
knots  ore  moro  and  auxiliary  machinery  running, 

o«  Reoeivers  oonnootod  to  oomnutator  and  osoillators. 

By  throwing  switch  IC.  Rango  2^  milos, 
d.  Reoolvors  oonneotod  to  amplifier,  oonmutatnr.  nnd 
osoillators.  No  switches  thrown.  Range  unknown. 


Appendix  0-4 

4.  To  dofcorraino  pooltlon  of  submarine  -  Uao  nwitchos  E  and  M. 

a.  To  do  tormina  whothsr  to  port  or  tostarboard  throw 
switch  E  oo  that  ono  port  anil  ono  nt onboard  oDoillstor 
nro  on  and  oomparo  autnmrlno  sounds  on  port  and 
starboard  ooclllator  by  throwing  owitoh  U  to  right  ■ 
or  loft. 

b.  To  dotormino  whether  aubmarlno  is  ahead  or  astorn 
throw  snitch  E  so  that  ono  forward  and  ono  aft 
oscillator  is  oonneotod  and  then  throw  switch  II 
so  as  to  dotoimino  wliothor  sound  of  submarins  is 
strongor  on  foro  or  aft  oscillator. 

General  Remarks; 

Tlio  apparatus  as  heroin  cnaolfiod  Is  suffioiontly  dovolopod  far 

all  jraotioal  purposos  for  submarine  dotootlon,  inasmuch  as  it  pormlto  of 

The  problem  of  detecting  submarlnoo  at  ranges  up  to  ralloo 
or  moro  fran  dostroyoro  traveling  at  speed  of  20  knots  or  noro  has  now 
boon  scSLvod  and  the  apparatus  io  ready  to  bo  turned  ovor  to  the  production 


December  10th  1017 

Mr  Thomas  A  Edison 
Orange  New  Jersey 

Dear  Sir:  The  Secretary  of  War  has  referred  tc 

me  your  communication  of  November  24th  relative 
to  Priority  Certificate  for  electric  motor  for 
experimental  purposes. 

I  will  see  that  this  priority  certi¬ 
ficate  is  granted  as  soon  as  vie  are  advised  that 
the  order  has  actually  been  placed  with  the  Sprague 
Electric  Company. 

Kindly  give  us  the  date  and  number 
of  the  order  along  with  any  other  information  as 
to  the  size  and  type  of  motor  required,  etc. 

Colonel  USA 

General  Staff 

December  11,1917 . 

. Hon.  P.  J-  UcCumbor, 

Uni tod  Statoc  Senate, 
liashington,  D.  C. 

lly  dear  Senator: 

i  have  received  your  favor  of 
the  10th  instant. 

V/hile  it  io  quite  true  that  1  have 
collected  a  groat  deal  of  data  in  reference  to 
.  shipping  and  submarine  activities,  my  v/or*.  has 
boon  done  at  the  request  of  the  Secretary  of  the 
llavy.  therefore,  X  hnvo  felt  it  to  bo  my 
duty  to  report  .the  results  to  him. 

ily  acquaintance  with  tho  regular  mothods 
of  tho  Govoi nmont  in  such  cases  is  vary  meagre , 
but  in  the  circumstances  it  would  soon  to  me  that 
I  might  commit  a  breach  of  official  etiquette  if 
I  were  to  furnish  tho  docired  information  without 
tho  spocial  roqueot  of  the  Secretary  of  tno  hav„ . 

jic  i  have  given  my  ontiro  time,  day  and 
night,  eineo  last  January  in  tho  eeryico  of  the 
country,  -it. will  bo  clear  to  you  that  it  is  my 
great  desire  to  do  everything  X  caiito^foryard  the 
country’s  interests.  .therefore,  I  am  suro  ./ou 
will  understand  that  this  lottor  is  not  to  impede 
hut  to  accelerate  progroes. 

yours  very  truly. 

Becehbor  11,1917 

Dr.  Hog Inal d  A.  1’ossendon, 
18b  Franklin  Stroot, 
Boston,  1,-oss. 

Uy  dear  Dr.  i’ocsendon: 

I  am  in  roooipt  of  your  esteemed 
favor  of  the  10th  instant,  in  which  you  enclosed  tho 
full  particulars  and  blue  prints  and  pamphlot  therein 
reforred  to.  I  urn  sending  these  down  "to  him  tonight 
by  Special  liolivoz-y. 

As  I  mentioned  in  ray  letter  to  you  of  last 
Saturduy;  I  am  quite  sure  that  Hr.'  Edison  would  be  indeed 
yory  glad  to  soo  you.  I  feel  quite  sure  that  he  will 
bo  in  Washington  for  at  loaBt  another  week.  I  sent 
you' directions  how  to  reach  him  in  ray  previous. lettqr, 
but  for  fear  it  has  miccarriod  I  will  repeat.  Ho  has 
an  offico  in  tho  J.'avy  Annex  Building,  How  lork  Avenue 
and  10th  Street,  Washington,  and  if  you  ask "tho  Boorman 
to  send  up  your  nano  ho  will  do  so,  and  you  will  hnvo.  no 
trouble  in  scoing  him.  ' 

Ho  has  been  laid  up  a  day  or  two  with'  lumbago, 
but  ho  is  very  likoly  to  get  over  thet  quickly  and  bd 
donw  at  his  offico.  If  he  should  still  be  away  whon 
you  got  down,  he  iB  staying  at  tho  Powhatan  Hotol,  which 
is  at  18th  Avonuo  and  Pennsylvania,  throe  blocks  away 
from  the  iiavy  Annex,  and.  if  ho  is  not  at  tho  latter  placo, 
I  Y/ould  suggost  that  you  go  to  the  Hotol.  as  you. know, 
there  is  nothing  dangerous  about  J.umbago,  but  it  sonotimos 
is  113:aly  to  keep  . a  porson  in  thoir  own  room  for  a  vhllo. 

Very  Dincerely  yours. 

Assistant  to  Hr.  Edison. 


Room  502,  Havy  Annex, 
Washington,  D.  C., 

Deoemher  11,  1917. 

Mr.  0.  A.  Richter, 

Chemical  Engineer, 

Experiment  Station, 

Bureau  of  Iiinos, 

'Washington,  D.  C. 

Dear  Sir 

In  reply  to  your  letter  of  December  7,  1917,  concern¬ 
ing  a  supply  of  liquid  Oleum,  I  can  advise  you  that  I  have 
a  stock  of  this  material  at  Annapolis  on  board  my  boat,  the 
U.  S.  S.  SACHEM.  I  can  let  you  have  the  amount  you  want 
(10-12  lbs)  and  wouia  suggest  that  you  sond  for  it. 

My  chemist  in  charge  of  this  material,  Mr.  Bruce  Silver, 
has  been  instructed  to  deliver  to  you  the  amount  required. 

Very  truly  yours, 

hoc.  Is ,iyi7 

Col.  fulnor  K.  Piorec,  U.  a.  n.., 
V  ar  Indue  tried  Bo  ard ,  • 

Council  of  national  iiefonco, 
V.ashinpton,  D.  C. 

Dour  Cir -* 

lour  favor  of  tho  10th  inotant  to 
iidiaon  has  been' received.  Ho  is  in  Vashlngton 
at. .present,  but  r  understand  the  matter  and  will 
roply  for  him. 

Lot  me  say j that  tho  ordor  for  the  electric 
motor  for  experimental  purposes  has  been  actually 
placed  with  tho  apruruo  ale c trie  Co.  fho  number 
of  tho  ordor  is  150170,  and  tho  dato  is  Locembor 
10,  l'.<17,  ( 1£3G ) .  ihoce  last  four  figures  indicate 
one  of  our  indox  numbers .  Eho  ordor  covers  one 
i,i-0,  115  Volt,  1760,  sorioc  wound  Motor.  Ooloctod 
by  Mr.  Varner. 

I  am  very  suro  that  i'x.  Mdieon  will  be 
much  obliged  if  Priority  Certificate  can  bo  placed 
at  an  curly  dato. 

■assistant  to  Mr.  iSdlson. 



i  12/10/17 

Sprague  Electric  Co. ,  1226  150170 

627  West  24th  St., 

New  York  City. 


Brady  for  Theo.  Edison. 

1  M-8,  115  Volt,  1760  RPM,  series  wound 


Seleoted  by  Mr.  Warner. 

To  be  manufactured  under  Government 
0  'ntraot  number. 

PRICE;  £  $455.00  less  10$ 



Shipping  point 


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~fc>  &*-*'  fiylA*-*'  tZ-C*-CA.  OJ-W-t tdcZ 
Uifl/  J  £*J  <ko  $ 
fyAMHi  J  &ra-4dPcf  Qt/rf  ^LtA^  JLima 
ty})a~tliAA  ^  er-^y  Zb.  ^Xt/a 

n-bZZty^-  Z-u.^  'E^.  ■.&**■ -tZ-- 

jkaJZZic^t  ~fib-y  £&z*-  2o  £a-t^^^y _ 

^  A^»<juy^A  £rfc  frai-iCf  And _ 

o^asiAcxlt&f  encJt'  k&cu-  _ 

O^  CpZtMd.  <^4a  . k9...  '.Zi*d*. 

9h&U  <Zfd-  6-r ... 

''jO^cA^.  _&r_  ..Z&a/ZZ.?'  t^/ 

oil  /6<g*o*fc<?0*'  ^  /*Ua' 

c/  4*=t"»  ^ *' 

&>1  !&*.  JtybL***-  OcJc  J f  J  edotC  da  tUy  rf»n«  ■  ' 

^  i£c/ 

d*,'^  /y'j&c.  9uZ^i-  CvtAJ  &jod/Ll+*. 

-*^t.  =  -f~  Aycd 

bee.  13,191V. 

Hr.  i1.  J.  Hull, 

c/o  Hubirshaw  Eloctrie  Cablo  Co., 

10  East  43d.~Stroe.t,  '  • 

Hew  York,  11. Y. 

boar  Sir:- 

ilr.  bhaffnor  has  boexi  tolling  mo  of  tho 
splend id  cooporation  Which  you  and  your  Company  have 
extended  to  him. in  connection  with  tho  special  cables 
which  you  have  made  up  for  me  for  Government  work,  _ 
and  I  am  writing' this  noto  just  to  express  my  thanks 
and  appreciation  for  the  prompt  and  courteous,  atten¬ 
tion  Which  you  have  kindly  given  to  this  epocial  v.ork. 

Yours  vory  truly. 


Dooember  13,1917. 

Dr.  iieginald  A.  Fessenden, 

18D  Franklin  Streot, 

Boston,  Msbs. 

Ily  door  Dr.  Fossondon: 

Deferring  to  your  favor  of 
the  Gth  instant,  addressed  to  tno,  you  statod  that 
you  got  a  note  from  the  Submarine  Signal  Company 
saying  that  iir.  Edison  wanted  some  Submarine  appar¬ 
atus,  and  ashing  mo  to  toll  you  if  ho  got  everything 
he  v.antod . 

I  have  just  received  ainoto  from  him  say¬ 
ing  that  up  to  this  time  ho  has'  not  ordorod  any 
apparatus.  •  Ho  hus  sent  me  a  memorandum  to  say  to 
you  as  follows:  "V.hat  I  may  need  is  a  cablo  around 
the  Harbor  with  two  or  throe  oscillators  making 
every  kind  of  a  sound  to  provont  a  U-3oat  listening 
for  oargo  bouts  loaving  tho  Harbor.  2ho  water  out 
for  £0  miles  should  soundod  full  of  noise. 

i.5r.  Fay  of  tho  Submarine  Signal  Company, 
v:roto  to  Hr.  Edison  undor  dato  of  ilovembor  15th, 
stating  that  ho  had  conferred  with  you  regarding 
tho  inquiry,  and  ho  proeoedod  to  givo  iir.  Edison 
particulars.  "his  lottor  camo  to  Mr.  Edison  while 
I  was  doriw  in  bashington,  and  ho  handed  it  to  mo 
to  keep  for  him.  Whethor  or  not  ho  wants  anything 
furthor  from  you  personally  I  do  not  know. 

-  Vory  sincerely  yours. 

Assistant  to  Er.  Edison. 



_ oS  ■/i&uLt.vt./tZ 

tjo-tts* _ tvC^jht  ,  —  .-.  -  . 

hle-Cudio-ur^^C  .'•.  . 

Dec.  IS, 1917. 

Hr.  ".  Proctor  Hall, 

1301  Davie  ttrcot, 

Vancouver ,  Canada . 

Boar  tiir:- 

Hr .  Kdison  lias  Been  av.ay  from  hone  sinco 
the  beginning  of  October,  and  naturally  fibers  has 
boon  a  long  delay -in  eorno  of  his'  corrospdmdoReo. 

Your  suggestion  of  "A  I’og-eyo"  was  received 
and  ho  has  loolccd  over  tho  same.  Ho  vishos  us  to 
eay  that  several  other  persons  have  oxnerir.ionted 
vith  the  scheme  v.hieh  ;;ou  outline  in  your  paper,  and 
thoy  suy  that  thoro  is  so  llttlo  rango  that  it  is  ■ 

U r.  Udison  desires  fis  to  thank  you  for 
your  interest. 

Yours  very  truly, 
iidison  Laboratory.  ■ 


Doc.  15,1917. 

Ur.  Mruec  E.-  Silver, 

U.  S.  S.  Sachom,  S.  i?.  192, 
annapolis ,  iid. 

Dear  Mr.  Silver: 

I  am  glad  to  loarn  from  your  letter 
of  yesterday  tliat  tho  friction  primers  for  your  Lyle 
gun  had  boon  received. 

.as  to.  tho  Oleum,  I  wrote  you  yesterday  send¬ 
ing  you  the  bill  of  lading.  You  ought  to  recoivo 
it’ within  a  few  da;.'E,  as  I  instructed  tho  Gonoral  Chon- 
ical  Co.  to  mart  tho  drum  "1’or  Government  Work".  How- 
over,  I  will  ask  them  to  bond  a  tracer. 

I  will  ask  Charlio  Dally  to- make  up  a-quartor 
or  half-pound  of  tho  spooial  lamp  black  for  you  and 
sond  it_as  soon  as  it  iB  ready. 

that  a  fortunate  thing  it  waa  that  no  one 
was  injured  whon  the  cchoonor  run  into  the  "Sachora". 

I  had  a'lottor  from  Mr.  Hanford  yestoiday,  in  which  ho 
statoi  that  the  Captain  was  delayed  in  town  that  night, 
which  waB  fortunate  for  him  uu  ho  might  huvo  boon  in 
hio  bunk  at,  tho  timo  (kite  accident  occurod.  It  is  too 
bad  that  the  "Sachom"' ie  so  crowded.  Howovcr-,  you 
are  fortunate  in  ono  thing  and  that  Is  you  can  add  on 
an  extension. 

It  io  too  bad  Mr.  Edison  has  the  lumbago. 

It  in  rather  a  painful  eort  of  troublo  and  ae  it  involves 
a  good  doal  of  loco  of  free  movement  of  tho  body,  it 
io  not  conducive  to  good  nature.  I  hope  he  will  soon 
bo  all  right  again. 

Mr.  Altongnr ten  will  hold  the  Dturtovant 
package  for  you,  ao  roquoctod. 

Yours  very  truly. 

Assistant  to  Mr .Edison. 

. . 

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Deoember  14,  1917. 

Appln .  16747. 

The  Edison  Laboratories, 
Orange,  New  Jersey. 


There  are  enclosed  herewith  original  and 
duplicate  copies  of  Principal  Priority  Certificate 
No.  A  2743,  issued  at  your  request  on  tne  Sprague 
Eleotrio  Manufacturing  Company,  to  whom  the  original 
should  be  sent.  The  duplicate  copy  is  for  your  files 

Very  truly  yours , 







Deosraber  13,1917. 

On  potitio 

ORADOE,  H.  J. 

of  THOMAS  A  ED  13 OH. _ 

TO  CERTIFY  tll»t  tllO  Order  No. - 

dated  ....12/10/17. 

pi  need  with  you  by  «*»  - 

ooyoring  1  -  Motor  as  ordered  byHr...Bdl»Wl» 

PsllTarv  requested  at  the  Edison 
.  Ijn  mu  Laboratories  at  Orange,  E.  J.  «w  ... 
early  as  possible. 

is  lioroby  givon  priority  as  Class  A...,  and  tl.o  execution  of  this  order  will  take  precede, ice  over  all 
your  ordoi-s  and  work  of  a  lower  classification  as  proscribed  by  Circular  No.  1  issued  by  this  Committee 
dated  Soptoinbor  21,  1917. 


N.  E.  Mason 

Docomber  11,1917. 

Jr.  3ruce  ii.  Silver, 

U.  S.  S.  sachem,  S.J.191, 
Annapplic ,  i'.d . 

Jour  Jr.  Silvor : 

I  an  in  receipt  of  your  note  of  yesterday, 
and  regret  to  learn  about 'your  stop  v.atch  going  on  tho 
blink.  I  will  see  about  getting  you  a  now  ono  right 

I  will  look  around  bore  arid  sec  if  thoro  is  a 
3-inch  nicronotor  to  oparo.  and  if  so,  will  nail'  it  down 
to  you.  If  not,  1  w ill  have  to  buy  ono. 

In  accordance  with  your  suggestion,  I  will 
write  to  the  DuPont  people  about  tho  pellets  and  will 
place  an  order,  but  you' do  not  say  how  many  you  will  want, 
lou  only  say  in  your  letter  that  you  will  want  "some" 
pellets.  Please  lot  mo  know  how  many,  and  at  tho  samo 
tirao  will  you  lot  mo  know  their  trade  name  for  them  if 
you  have  it.  I  do  not  know  it. 

Captain  Patton  tolophonod  mo  yostorOay  and  asked 
mo  to  got  some  red  lornns  made  of  tho  natural  rod  glass. 

I  told  him  that  I  oo'uld  got  thorn  raado  vory  quickly.  xio  ■ 
wanted  two  kin*,  ono  with  tho  rorular  Edison  base  and  tho 
othor  with  tho  candolabra  huso.  I  put  a  littlo 
on  tho  Lamp  ’..oiks,  with  the  results  that  tho  ropulur  base 
lamps  aro  roady  ana  will  be  forwarded  today.  I  gavo 
directions  to  ship  thorn  to  you,  so  will  you  ploase  hand 
thorn  to  Captain  Patton  when  they  arrivod.  I  oxpoct  that 
the  other  lamps  with  tho  candelabra  base  will  bo  dono  on 
llonday,  and  will  be  shipped  in  tho  Bamo  nannor.  Ploaso 
coe  that  Captain  Patton  gets  then. 

Y.ith  kind  regards  to  you  nil,  I  remain, 

'1  our e  very  truly. 

Assistant  to  lir.  lidieon. 

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Doc.  10,1917. 

Dr.  iioginald  A.  Fessenden, 

105  Franklin  Stroot, 
Boston,  Uses. 

Hy  dear  Dr.  i'essondon: 

Ur.  Faison  has  returned  from 
Washington,  and  Kill  probably  Bpond  the  Christmas 
Holiday  at  home.  Ho  has  beon  hamperod  a  groat  deal 
for  a  week  or  ton  days  with  an  attack  of  lumbago, 
which  intorforos  altogether  with  his  locomotion. 

I  saw  him  this  morning  at  his- home.  He 
wished  no  to  writo  to  you  and  say  that  as  soon  as  his- 
back  gets- straightonod  out  and  ho  is  able  to  come 
down  to  the  Laboratory,  ho  would  like  you  to  como 
down  and  havo  a  talk  with  him.  I  shall  tako  pleasure 
in' advising  you  when  the  timo  comes",  and  I  have  no 
doubt  that  you.would  also  liko  to  soe  him.  Hois 
groatly  intoroctod  in  tho  papers  and  .blue  print  you 
sent 'him  a  few  dayB  ago.  , 

•  -  kith  kind  rogar.ds,  I  rorohin, 

'fours  sincerely. 

Assistant  to  Mr.  lid  icon. 

A/4268.  ’ 

Docomber  10,19X7. 

Sprague  Electric  Ufg.  Co., 

-  V.atseeoing,  ii.J. 


Ilorovith  I  beg-'to  hand  you  .Principal  Priority 
Certificate  lio.  P-2743,  dated  Bocember  13,1917,  issued 
by  tho  War  Industries  Board,  in  regard  to  the  motor  cov¬ 
ered  by  our  Ordor  Ifo.  150170,  dated  Docombor  10,1917. 
loti  vi 11  notice  that  tho  order  ie  given  priority  as  Claec 

Yours  very  truly, 

Asoiotant  to  Jar.  Udison.  - 

A/4266.  •  , 

Enclosure . 



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DocV  19,1917 

Hr.  Bruce  I1..  Silver, 

U.  S.  S.  Sachom,  S.  P.  192, 

Annapolie,  IM.  >  -  .  . 

Boar  lir.  Silver: 

.  X  rocoivod  your  favor  of  tho  17th 
instant,  and  am  gla<:  to  learn  that  tho  red  lamps  v.ith 
tho  regular  iidison  b:so  came. to  hand.  I  trust  tho 
othor  ones  5J&4&  also  boon  recolvod  by  this  time, 
will  you  kindly  lot  me  know. 

I  have  written  to  tho  Bn  Pont  Company  order¬ 
ing  10  pounds  of  tho  pellets  epociriod  in  tho  letter 
of  tho  Bu'  Pont  poople  undox  dato  of  October  ,20th. 

I  havo  ordered  them  sorit  down  direct  to  you,  so  you 
.may  bo  on  tho  look-out  for  them. 

with  kind  regards  to  you  and  all  my.  other 
friends  on  the  boat,  I  remain. 

Moure  sincorely, 

Hatol  CwsmwG  Board- 


11  Broadway  New  York 


Thomas  A. Edison, Esq., 
Navy  Annex  Building, 
Washington, B.C. 

)se.r  Ur .Edison:- 

I  enclose  a  memorandum  which  has  been  sent  to  me  by  hr. 

>or-'6  Wharton  Pepper  of  Philadelphia. 

1;.. Pepper  advises  me  that  this  was  submitted  to 

hlB  by  Major  nerbert  Musgrave  of  the  British  Army,  now  recovering  in 

England  from  wounds  received  at  the  front. 

X  hope  that  you  may  be  able  to  be  present  at  tne 
meeting  of  the  Naval  Consulting  Board  at  the  Carnegie  Institution  next 
Saturday.  I  have  invited  the  Secretary  of  War,  the  Secretary  of  the  Navy, 
General  Squier  and  Admiral  Earle  to  be  at  this  meeting  and  to  join  us  at 
lunoheon  at  one  o'oloo’x. 

Very  truly  yours, 


~copy  lor  Mr. Edison 



successful  camouflage  depends  so  muon  on  the  adjustment  of 
colouring  to  illumination,  that  ships  ought  to  carry  two  canvas  screens 
'orailed  up  along  the  gunv.hale  on  each  side.  One  of  these  screens 
should  be  suitably  coloured  for  when  the  sun  is  shining  on  it,  and  the 
other  for  when  it  is  in  3 hade .  The  appropriate  screen  should  always  be 
let  down  on  each  side  of  the  ship.  Each  funnel  should  he  encased  in  a 
oanvas  cover  painted  dark  one  side  and  bright  the  other,  and  shaded  off 
in  between.  The  cover  should  frequently  be  turned  round  the  funnel  so 
as  always  to  be  oriented  with  the  dark  side  towards  the  sun. 

It  should  be  possible,  and,  if  so,  very  useful  for  conceal¬ 
ment,  to  discharge  the  smoke  from  ships'  furnaces  through  flues  dis¬ 
charging  under  water.  This  would  require  forced  draught,  &  rotary  fans 
at  the  mouth  cf  the  flues  to  keep  the  water  out.  This,  of  course,  en¬ 
tails  loss  of  power  and  speed,  but  probably  that  would  not  matter  much 
compared  to  the  advantage  of  rendering  the  smoke  invisible  at  a  few 
miles.  That  it  would  effect  the  latter  result  I  think  is  probable  and 
all  the  heavier  partloles  of  soot  should  get  caught  and  retained  in  the 
water.  One  might  even  inject  a  spray  of  water  into  the  flue  on  the 
furnace  side  of  the  rotary  fans  to  assist  in  the  washing  of  the  products 
of  combustion. 

Artificial  smoke  clouds  can  ce  used  to  screen  ships  in  a 

When  in  the  presence  of  submarines  one  can  burn  smoke  candles 
do.  on  the  ship  Itself,  or  throw  them  from  the  ship  to  drop  astern  and 
burn  as  they  float,  or  propel  them  by  means  of  mortars  to  any  desired 
point  to  windward  of  one's  own  ship  or  the  submarine. 

A  given  area  of  water  can  be  kept  o'oaoured  by  a  smoke  oloud 
between  given  hours  by  smoke  candles  do.  burning  on  buoys,  or  station¬ 
ary  vessels  on  the  windward  side  of  the  given  area. 


ily  dear  Ur.  Khierin: 

■  i  un  3uro  you  will  be  glad  to  loarn 
that  Or.  Kdieon  is  feoling  a  good  deal  bettor  and  expects 
to  cone  down  to  tho  Laboratory  tomorrow.  _  Ho  has  not  yet 
boon  hero  since- he  como  home,  but  I  saw  him  thie  morning 
and  he  told  mo  that  ho  fully  oxpoctod  to  bo  down  tomorrow. 

How,  hore  is  something  that  i  wish  you  would 
kindly  do  for  Theodore.  tomorrow  .  Ho  wanted  *to  got  somo 
of  tho  mans  tliat  aie  furniched  by  tlio  l).  2.  zoological 
Survey.  ‘  Porhaws  you  aro  aware  of  tho  fuct  that  those 
maps  como  in  sections  of  various  dimensions.  He  wants  to 
got  tho  sections  showing  all  tho  lower  cna  of  llorrda, 
-especially  tho- Islands,  which,  1  boliovo,  aro  usually 
called  tho  Hoys. 

The  Geological  Gurvoy  also  piiblishos  a  hoy  nap, 
which  is  divided  off  in  squares,  with  a  number,  (oano  as 
tho  indox  chart  of  the  Hydrographic  Office N  rhoocoro 
alBO  wants  ono  of  these.  .  1- believe  that  they  aro 
or  oomo thing  like  that.  -  You  con  nay  for  thorn  out  o,.  your 
funds.  -  *■  • 

Yd  ill  you  kindly  rot  thorn  off  tomorrow  and 
thorn  to  mo  and  put  a  Gpocial  Uolivory  Stamp  on  thorn'. 

I  on  awfully  glad  to  loarn  from  your  favor  o f  tho 
10th  Instant  tliat  you  havo  hud  Hr.  and  lira.  Butler  to 
dinnor  over  at  tho  Powhatan.  I  have  been  Intending  to 
do  this  for  somo  little  timo  pact, -but  somehow  could  not 
soon  to  got  to  -it.  Will  you  please  givo  Hr.  Bailor  ny 
kindest  regards  and  toll  him  that  I  thought  of  him  vor j 
of ton, and  always  with  a  groat  doal  of  ploasuro. 

m+.Vi  vinfl  roparda  to  you  and  Hr*  T.olfo,  1  remain. 

Hr.  Vi.  H.  Xriiorin, 
Hotel  Powhatan, 

Washington,  D.C. 

B.  X'.  Du  l’ont  De  Honours  &  Co., 
Du  Pont  Building,  • 

Wilmington,  Del. 

Gontloraon:  Attention  itiflo  Umokolcss  Dlv. 

SUB JDCg  -  Powder  Pellets 

Under  date  of  October  30th,  you  wrote 
to  ue  in  relation  to  powdor  polio to,  and  stated  that 
the  largest  pellet  manufactured  by  you  is  .39  X  1".' 

I  am  now  enclosing  a  Purchase  Order, 
iio."  166470,  covering  ton  pounds  of  these  powder  pellets , 
to  bo  shipped  to  3ruco  It.  Silver,  UiS.S .Be, chon*  (S.P.19!:), 
Annapolis,  lid. 

_  I  trust  it  will  bo  convenient  to  you  to 
make  vory  prompt  shipment  of  this  ordor. 

Yours  vory  truly. 

Assistant  to  Hr.  Adi son. 

Hr.  B-.  C.  Shaffnor , " 

U.  3.  S.  Sachem,  3.  P.  19£, 
Annapolis,  lid.. 

hoar  Hr.  Shaffnor: 

I  received  your  favor  of  the 
19 th  instunt,  and  have  telephoned  the  teuton  Electrical 
Instrument  Co.,  but  so  fur  have 'no  nows  of  the  arrival 
of  the-  Volt-Amnotor .  I'hoy  aro  to  call  me  up  later 
again  in  the  day.  You  may  aopond  upon  it"  that  I 
will,  of  course,  do  everything  1  can  to  expedite 
the  repairing  of  the  instrument. 

I  cannot  ask  fjhem  to.  loan  another  one  unless 
you  send  mo  full  description  of  the  instrument 'you 
have  returnofl  for  repairs.  Shore  are  a  grouty  many 

.  X  oent  down  to  you  by  .Express  yesterday,  . 

the  two  Kennedy  buporimont  books,  and  trust  you  have 
roceivod  them  safoly.  Will  you  ploaso  lot  me  know, 
us  I  an  rathor  anxious  to  loarn  whether  they  havo 
'como  to  your  hands. 

Yours,  very  truly. 

Assistant  to  Hr.  Edison. ■ 

P.S..  -  Since  dictating  tho  above,  I  have  hoard  from 
the  Weston  Electrical  Instrument  Co.  on  the  'phone, 
and  they  say  tho  instrument  has  not  arrivod.  iou  had 
bettor  sond  a  .telegraph  txoeor.  after  itf  and  toll  the 
Express  Co.  that  it  is  for  Government  work. 

Doc.  21,1917 . 

ilr .  o  .C.  Shuffner , • 
c/o  U.  S.  a.  Eachom,  S.  P.  192, 
.Annapolis,  lid.  '  ... 

Dear  ilr.  Shaffner:  ' 

Mr.  Edison  wishes  mo  to  -write  and 
say  that  you  may  let  tlio  boys  go  for  Christinas,  that 
is  to  say,  thoso  of  thon  who  wish  to  go.  ,  Mi-.  liaison 
wants  them  to  bo  bach  at  tho.boat  not  later  than  the 
second  day  after  Christmas,  as  it  ie  possible  he  v. ill 
como  down  thon  for  a  brieiij?  stay. 

‘'ilr.  liaison  has  given  special -permission  to 
Prod  Ott,  and  I  am  mailing  the  note  to  Prod  tonight. 

.Kill  you  kindly  toll  -Captain.  Patton  that 
Mr.  Edison  says  ho  can  lot  any  of  his  boys  go  to  cond 
Christmas,  if  they  wont  to,  but  to  bo  on  hand  the 
second  day  after  Christmas  day.  Of  course,  this  covors 
also  Ur.  silver  ana  Mr.  Vreeland.  In  other  words, 
this  permission  oxtond u  to  the  whole  bunch  over  which 
wo  havo  any  control. 

Yours  vory  truly. 

Assistant  to  Ur.  Edison,. 

ji/dSOb.  • 

%rl  //v/A  5  -/ 

fot6sr~  tyyi'v  y  cus/<sujv^ . 

ti.  .  to  'IjO-U. 

~tc>  fy\  £?-/gl,  Cuts^d-^vLA.  tyPlSxX&J  fyt  Crd-tA-  ^yy/dt  '^-'/  -^ 

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~jr  ~*rrzjw: ::  rJ iO/  h7£^~~  »  ~ 

A-  fr/st.  cpy^.  dy. 



(?S  fh-ayyt  CouU 

■•d-p  hnJjs>  Jr  <y\s  d 

Hoc.  24,1917 

Mr.  3.  C.  Hhaffner, 

'  U.  S.  S.  Sachem,  8.  P.  19£, 

Annapolis,  Md.  ; 

iiy  dear  Mr.  Shaffnor: 

I' have,  rocoivofl  your  note  of 
tho  H£d  instant,  ana  am  find  to  loam  the  coincidence 
about  our  friend  ilooro. 

It  is  too  bad  you  havo  boon  hampered  v.ith 
euch  a  lot  of  miscellaneous  trouble,  but  I  havo  every 
confidence  in  your  ability  to  straighten  things  up. 

Of  course,  I  an  sorry  to  learn  that  you 
find  any  difficulty  with  tho  other  individual  you 
mention.  that  is  a  situation  -that  you  v.ill  havo  to 
handle  vrith  very  groat  diplomacy  and  tact.  Ho  has  to 
his  credit  more  than  30  years  of  service  v.ith  iir. 
.Edison,  and  is  truly  "One  of  tho  1’umily".  Of  course; 
it  may  bo  difficult  at  times,  but  you  pill  surely 
have  to  find  eorao-  way  around  it.  Ho  is  really  only 
accountable  diroct  to  Mr.  Edison. 

another  matter.  Mr.  A.  Air by  of  tho 
•Vioelorn  Elec tide  Company,.  Hop  r'orh,  called  mo  up  and 
said  that  he  had  supplioa  you  Pith  a  half-mile  of 
Field  Viire,  but  has  nover  had  any  ordor  for  it.  ¥.111 
you  pleaeo  lot  mo  knov,  as  Boon  as  you  can  vhothor  this 
is  corroct,  und  if  so,  I  will  issue  a  Pur, chase  Order 
covering  .it.  _  ... 

i  I  v.ish  you  a  Horry  Christmas  and  a  .Happy 

Hop  Xoar . 

lours  very  truly. 

‘Assistant  to  Mr.  Edison. 


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Doc.  27,1917- 

Hr.  Hebert  Darling.  • 
13ns ign-Biekforfi  Co . , 
Simsbury,  Conn. 

Uy  dear  Hr.  Darling: 

Vi  ill  you  kindly  express  ono 
.„11  spool  of  coraooo  to  U.  3.  1-  ~»m.  »•  »• 

192,  Annapolis,  IM- 

OSJ  fosos  poo  raodo  op  for  os  sro  prortoB 
„fy  sstlefootory-  .  *o  .o.stloo  of  »*»«  «“» 
oots  oot  of  Coraooo,  I  loornad  fres,  Hr.  Mlson.  U 
bolng  taollod  bp  Ur-  c«°I>or  Uorltt- 

I  rocoll  tho  Tory  ploossot  stay  St  yoor 
is  Simsbury  soa  opprooloto  yoor  coorto.y. 

Sincerely  yours, 

Kdison  Laboratory, 


J)$Xn  •  fiefrcn't  QLuj^, 

■hi uu>J&un.^  (l«J  ■ 

djut*  llu .  Sr&JLay':  .  .  . 

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blUL  ’inu-tju  ®|  ^-t^cijuuj)  'fb 

7(.5.5.  5-4^^  54/72.  ,  .6lum^I>JL. 


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(j^uf‘oh**0.  6 1 <U«jJC4«^  ^ubmsjtuifl-  . 

/luJl  «Lct>  ^  ;  9""  OsxasiM J®6> 

jLjb  K.  is  £w. 

4m  I/O.  •  CtjJjtA.-  [4j-, 

v-Qrnm*^^  ^ . 


Dee.  £7,1917 

Ur.  3.  C.  Sheffncr, 

U.  3.  3.  Saclien,  3.  P.  192, 

Annapolis,  Hd . 

Uy  dear  I.:r.  Shaffhar: 

I  have  rceoivoci  your  note  of 
yostorday's  date.  Dot  no -say  in  roply  that  Hanloy 
was  here  yesterday  and  I  sent  him  over  to  the  V.eston 
Electrical  Instrument  Co.  to  Eee  thorn  personally 
about  the  instrument,  as  I  could  not  soon  to  get 
satisfaction  over  tho  telephone.  Hanley  has  not 
shown  up  since,  so  X  do  not  know  what  ho  did"  about 

I  took  up  tho  other  oat  tors  with  Hr.  Edison, 
and  thought  it.  was  best  .to  take  the  bull  by  tho  horns 
and  showod  him  your  letter.  lie  understood,  and  I 
think  he  will  roguloto1 everything  when  he  coraoc  down 
thorp.  Dot  no  supros  t  that  you,  go  oasy  on  tho  par¬ 
ticular  porcon  whom  you  havo  nentioned.  2he:o  is 
ouito  a  close  relation  thero,  which  should  bo  handled 
with  extremo  caro. 

lours  vory  truly. 

'kssictant  to  Hr.  Edison. 

A  /433d . 

. (Uiteubishi ' s  letter  to  i’heo  and  Earner  with  note  from 
Ur.  liaison  on  it.  ) 

Doc.  27,1917 . 

Dr.  X.  duyehiro, 

c/6  Mitsubishi  Goshi' I'nisha, 

1£0  iJfoadway, 

Iiov*  York,  i!.Y. 

Dear  -Dr .  cuyohiro  : 

I  v.oula  ask  you  to  kindly  excuse 
the  one  day's  delay  in  replying. to  your  estooned 
favor  of  the  24th  instant."  I  so  very  busy 
yosterday  r.ith  Hr.  he!  icon  that  I  did  not  pet  tir.o 
to  write  to  you. 

In  regard  to  the  Hydrogen  Detector,  let 
me  say  that  ono  of  those  instruments  in  non  boing 
rnnao,  and  as  soon  as  it  is  ready  I  shall  take  ploas- 
■urc  in  writing  to  Ur.  a.  Hagenuiaa  of  that  Company. 

I  um  sorry  that  v.e  cannot  name  a  price  now,  but  I 
think  Uitsubi8hi  a  Co.  rill  be  nuito  catisfiod. 

I  take  pleasure  in  forward inp  to  you  horc- 
v.ith,  tho  two  photographs  of  the  instilment  in  accord¬ 
ance  with  my  promise. 

kith  cordial  greetings  and  boot  of  wishes,  . 

I  remain. 

Yours  vor y  truly. 

Assistant  to  Ur.  Jidison. 


IJisuoi*  Gct'lv-I#ercblv  Co. 

ixs(x,vri:i>  ivuti:  ami  <;m-.v-i'i:i;nu  <iooi>s 

420  to  4  :10  JSaht  2.TL"  Stuiset 

TfKwTonK,  December  27th  1917. 

Mr.  S.  C.  Shaffner, 

S.  S.  Sachen  (S  P  192) 

Annapolis,  Md. 

My  Pear  Sir:- 

. Herewith  I  enclose  sample  of  the  cable 
which  we  have  made  up  for  you,  and  would  advise 
that  we  wouia  have  been  able  to  have  made  shipment 
of  this  today,  but  for  the  fact  that  there  were 
some  small  blisters  developed  on  the  outside  layer 
of  rubber,  which  I  thought  better  to  have  cut  out 
and  repaired  before  sending  you  the  cable. 

Thin  layers  of  rubber,  put  on  in  the  way 
this  is  put  on  often  times  does' ccmse  tro\ible  in 
blistering.  However  other  times  the  cable  will  go 
through  without  trouble.  We  have  submerged  these 
cables  in  water  for  a  period  of  fourteen  hours, 
tested  them  to  ground,  and  find  that  there  is  no 
leaks,  so  that  I  feel  certain  you  can  use  the  cables 
and  that  they  will  be  satisfactory. 

: As  soon  as  the  cables  are  ready  for  ship¬ 
ment  I  will  call  up  Mr.  Huntington,  and  endeavor  to 
have  him  use  his  best  efforts  to  see  that  the  cable 
is  delivered  to  you  promptly. 

Yours  very  truly, 


Vico  President, 


Mitsubishi  Goshi  Kaisha 


Equitable  building 


New  York  Deo.  28th.  1917. 

Mr.  W.  H.  Meadoworoft, 
The  Edison  Laboratory, 
Orange,  N.  J. 

Dear  Mr.  Meadoworoft, 

I  am  In  receipt  of  your  letter  of  the  27th.  Inst,  enclosing 
photograph  of  the  Hydrogen  Detector,  for  which  please  accept  my 
sincere  thanks. 

Mr.  S.  Naganuma  of  the  Mitsubishi  Co.  is  anxious  to  hear  from 
you  regarding  the  apparatus  in  an  early  date. 

With  best  wishes,  I  remain. 

Yours  very  sincerely. 

V-  ^ 


December  £0,1917 • 

V. .  d  .  caundore ,  Chr . , 
lfaval  Consulting  Hoard, 

11  Broadway , 

How  York,  H.l. 

lour  favor.  of  the  19th  instant 
jo  iir.  Bdison.  was  sent  up  hero,  as  ho  returned 
10mo  for  the  Christmas  Holidays.  ,  Ho  has  boon 
I  >-f*feriiifr  the  last  two'  wocks  with  sorao  trouble  in 
bach ,  which  hae  kept  him  in  the  houco  most  of 

Ho  wishoa  me  to  say  to  you  in  regard  to  ■ 
the  nomorondum  cent  to  you  by  iir.  Goorge  i.harton 
Depncr  of  Philadelphia,  that  we  already  haro  u  per¬ 
fect  ays  tom  of  camouflage  whereby  the  ship  is  adjust 
to  tho  variable  amount  of  light,  so  that  it  shall 
equal  the  light  of  tho  sky  linie.  hr.  iidisoir  says, 
however,  -that  it  is  doubtful  5f  tho  Governments  will 
do  anything.  - 

lours  very  truly. 

iir.  iidii 


. L 

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-^r  «' 

c.  £9,1917. 

Hr.  3.  c.  Shaf flier, 

U.  3.  S.  Sachem, 
Annapolis,  lid. 

My  dear  Hr.  Shaffner: 

X  have  been  in  communication  with 
the  Weston  Electrical  Instrument  Co.  several  times,  but 
find  they  have  not  yet  received  the  Volt-Urometer  which 
you  sent  them  on  the  19th  instant.  You  had  better  send 
a  telegraph  tracer. 

.If  you  have  got 
right  away,1  you  had  better 
typo  which  you  expressed  on 
is  a  great  variety  of  types 

to  have  another  instrument 
send  me  a  description  of  the 
the  instant.  'there 

I  received  your  telegram  asking  me  to  express 
a  box  of  wax  in  Ho.  4  Building.  It  arrived  too  late 
to  shin  it  today,  but  I  will  get  it  for  Holiday  if  1  can 
find  it. 

I  have  Just  roceived  a  second  telegram  from 
you  asking  me  to  send  two  sots  of  ear  tubes  by  mail. 

1  am  not  nuite  sure  what  you  mean  and  have  telegraphed 
for  particulars.  Anyway,  we  could  not  get  them  off 
today  as  everything  closes  at  Hoon  on  Saturday. 

I  am  sorry  that  it  happens  in  this  way.  I 
hope  you  will  not  think  1  am  stupid  about  these  ear  tub  cm  , 
but  I  am  not  sure  whether  or  not  you  v.ant  the  Dictating 
iifichino  ear  tubes. 

Wishing  you  a  Happy  Hew  Year,  1  remain. 

Yours  very  truly. 


'/jO-ik!  Potion  J&Oo 

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hoc.  31,1917 . 

Jli'  ■  Bruce  KS  Silver, 

U.  3.  S.  Sachem,  S.  i>.  192, 

Annapolis,  lid'. 

Dear  Hr.  Silvor: 

I  hevo  .received  your  letter  thiE  nom¬ 
ine  and  rogrot  to  learn  that  the  ruby  lamps  with  canda-  - 
lebra  huso  were. not  of  the  right  shape.  Captain  Patton 
told  mo  that  eperical  'globes  v.ore  -.-.anted  for  all  of  the 
lamps,  so  i  had  them  made  accordingly.  I  Trill  not  . 
have  some  other  made  according  to  the  dimensions  -ou 
have  £ ivoij.  Of  course,  it' rill  take  a  few  days'1  to 

pet  thorn,  but  I  .trill  nut  the  matter  in  hand  right 

I  rill  try  to  dig  out  the .waybill  covering' 
the.  shipment  of  100  pounds  of  Oleum  on  December  Btli  , 
and  if  the  frolght  is  prepaid  will  send  it  down -to  you.- 
I  will  also  push  the  tracing  of  the  large  drum  of  Oleum 
from  .the  General  Chemical  Co. 

In  regard’  to  the  stop-watch,  your  remarks  arc 
•noted,  and  when  I  get  it  back  from  you  I  will  £o  down 
and  see  tho  pooplo  from  whom  I  purchased  it  and  see 
if  they  will  make  good.  .  . 

I  will  also  attond  to  the  matter  of  accounting 
records  for  Air.  Ghaffher.  X  am  still  awaiting  a  reply 
to  my  question  as  to  the  other  records  for  tho  musical 
instrument.  You  sont  a  list  of  records,  and  X  wrote  - 
asking  who  tho  r  this  was  a  list  of  viu.t  they  had  or  v.hothor 
it ’was  what  thoy  wanted,  hut  have  received  no  reply. 

'Ihe  other  matters  mentioned  in  your  note  will 
reooivo  attention.  1  an  glad  to  learn  that  thoro  has 
boon  some  change  in  affairs  and  that  thore  is  a  promise 
of  harmony  and  cooperation.  — 

I’loase  accopt  my  host  wishes  for  a  Happy  Hew 
7ear,  and  oxtond  tho  came.  V.ish  to  all  of  the  boyB. 

-  Yours  very  truly. 

Naval  Consulting  Board 


18  Park  Row.  N'mv  York 

DifC  31  1P17 

To  the  Members  of  the  Naval  Consulting  Board, 

Dear  Sirs: 

Please  be  advised  that  the  next  meeting  of  the 
Haval  Consulting  Board  will  be  held  on  JAN  5  -  1918 
in  the  Carnegie  Institution,  Washington,  D,  C. 

The  preliminary  meeting  begins  at  nine  o'clock, 
and  the  formal  meeting  at  ten. 

Very  truly  yours, 

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Naval  Consulting  Board  and  Related  Wartime  Research  Papers 
Subjects  --  Applications  for  Employment  (1917) 

This  folder  contains  letters  from  individuals  seeking  employment  on 
wartime  projects,  along  with  carbon  copies  of  Edison's  replies.  Included  is 
correspondence  with  Bruce  R.  Silver,  a  successful  job  seeker  who  contacted 
Edison  through  their  mutual  friend  John  Burroughs. 

Approximately  20  percent  of  the  documents  have  been  selected.  The 
unselected  items  consist  primarily  of  correspondence  that  received  no 
substantive  response. 

May  £1,1017. 

Ur.  Ooo.  UuthauB  Mayor , 

64  M.  HaiiClolr.h  Street, - 
Chicafo,  Ill. 

Dear  Sir:-'  . 

Your  favor  of  tho  20th  instant  hac 
boon  reeoivot1 ,  and  Mr.  i'.dison  upproe iatee  your 
offer  of  asnietanco.  lie  does  not  see  hot;  ho 
can  avail  Since If  of  your  cerviceac  Just  now, 
as  you  aro  so  far  away,  but  should  the  occasion 
arise  later  on,  ho  will  be  verified  to  connuni- 
cate  with  you. 

Yours  vory  truly,' 

Assistant  to  .\!r'.  iidison. 



My  dear  Mr.  Burroughs: 

I  learned  from  home  that 
vou  would  not  he  in  Roxbury  until  the  end  of 
the  month,  so  I  am  writing  to  West  Park. 

My  reason  in  doing  this  is  the  perturbation  of 
mind  arising  from  the  present  war  situation, 
and  X  thought  perhaps  you  might  be  able  to 
give  me  some  generous  advice  and  help. 

You  may  recall  from  our  conversations  : In 
Roxbury  that  I  have  been  studying  ohemiatry 
fnr  several  vears.  and  at  present  am  wording 
iMESd  fir  thi  Doctor'S  degree,  and  doing 
part-time  teaohing  in  the  ’Jniversity.  The 
disturbing  element  in  my  mind  iajust  what 
form  my  servioe  ought  to  take  inthinorisis. 

•  I  have  been  in  correspondence  with  Government 

Officials  who  seem  to  be  df  the 

particular  qualifications. 

The  government  itself  will  need  few 
additional  chemists  directly,  but  the  present 
idea,  I  believe,  is  to  plaoe  drafted  men 



I  feel  that  after  so  many  years  of  Prep¬ 
aration  I  ought  to  exhaust  every  possibility 
of  making  my  profession  of  servioe,  before 
joining  l  regiment.  It  the  end,  of  course, 

X  should  not  hesitate  to  do  the  latter. 

I  have  already  volunteered  my  servioes 
in  the  Government  Census  of  Chemists  but 
only  a  few  will  be  taken  direotly  into 
the  government  servioe  -  and  only  those 
with  the  particular  qualifications  they 
may  happen  to  require. 

My  present  idea  is  to  anticipate  the  draft 
and  beoome  located  with  some  manufacturing 
ooncern  or  in  some  research  oapaoity 
indireotly  oonneoted  with  the  government. 

I  have  been  appointed  at  Harvard  to  be  in  charge 
of  a  ohomistry  course  next  yearand  had 
tentatively  planned  to  continue  researoh  work 
during  part  of  the  summer  -  but  I  rather 
chafe  at  the  idea  of  remaining  here  when  my 
services  may  be  more  direotly  applied. 

Knowing  your  friendship  with  Mr.  Edison, 

I  wonder  if  it  would  be  asking  too  muoh  of 
you  to  presnnt  my  case  to  him  -  if  he  could 
use  a  ohemist  connected  either  with  resoaroh 
work  in  the  Counoil  of  National  Defenoe  or  in 
his  manufacturing  plants. 

You  may  not  be  in  a  position  to  presont 
mv  particular  qualifications,  but  you  know 
me  as  a  Roxbury  boy,  and  I  trust  you  may  have 
formed  some  impression  of  me  during  the 
pleasant  conversations  we  have  had  at 
"Woodohuok  Lodge 

Will  you  be  kind  enough  to  think  over 
the  possibilities  in  my  suggestion  -  or 
perhaps  offer  some  alternative  plan? 

With  kind  regards  to  Dr.  Barus  and  yourBelf, 

Boylston  Hall 
Harvard  University 
Cambridge,  Mass. 
June  tenth 
19  17 

Sinoerely  yours. 

Juno  16,1917. 

Ilr.  3rueo  i..  Silver, 
3oylston  Kail, 
Harvard  University, 

Dear  ilr.  Silver: 

Uur  friend  Jolin  3urrounhs,  lice 
sent  me  your  letter  of  tho  10th  instant,  and  I 
think  I’ can  appreciate  your  present  fruno  of  mind . 

i’or  sometime  past  I  have  boen  devotiny 
all  my  fine  to  some  special  aiperimonts  for  our 
Government,  assisted  by  a  few ■ youny  men  of  tech¬ 
nical  acquirements,  v.ho  have  come  with  mo  for  a 
nominal  compensation.  I  do  not  know  whether  or 
not  this  would  appeal  to  you,  as  I  can  only  of for 
C'2w  per  v:ook  as  a  starter.  As  you  are  probably 
aware,  tho  contemplated  Daval  ik.porimontal  laboratory 
v;as  not  built,  so  this  is  tho  only  thiny  that  offers 
at  prof.ont,  so  far  as  I  am  concerned. 

yours  very  truly. 


Sincerely  youro. 

396  Harvard  Street 
Cambridge,  MaaB. 
June  twentieth 

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Mr.  S.  -0.  Bhornan,  '  . 

147  Bridgham  Street,-  • 

Pro  vie!  once,  I-..  I. 

Dear  Sir:- 

Your  favor  of  the' ltth  instant  has  been  ’ 
received.  Possibly  Ur.  Udison  might-find  a  placo 
for  you  on  liis  sta:’f,  but  he  air.  ay  a  likes  to  see 
a  photo  of  applicants  who  -apply  by  la^or.  If  you' 
will  send  no  your  photo,  1  will  subnit  same  to  him 
with  your  lottor.  •  . 

Yours  "very  truly, 

,  Assistant  to  iir.  kdison. 

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Ur.  E.  G.'  Sherman, 

3.47  Sridghsm  Street,  ■  • 

Providence,  It.  I.  '  - 

Dour  Sir:- 

Your  favor  of  the  30th  ultimo  has  been 
shown  to  Ur.  Edison,  together  with  your  photograph. 

Ho  suys  that  if  you  would  like  to  start 
with  him  ut  *20. 00  a  week  on  experimental  work,  ad¬ 
vance  depending  on  your  ability  to  make  {rood,  you 
nay  crranrc’  to  como  on  in- the  next  one  or. two  weeks 
and  commence.  _ 

Please  advise  me.  . 

,  ioua-c  very  truly',  . 

1  Aesietant  to  Ur.  Edison. 

P.S..  I  ro turn  your  photograph  by  this  mail. 

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Naval  Consulting  Board  and  Related  Wartime  Research  Papers 
Subjects  «  Breathing  Apparatus  (1917) 

This  folder  contains  correspondence  and  other  documents  relating  to 
Edison's  development  of  a  breathing  mask  for  fire  fighting  on  battleships. 
Included  is  a  detailed  description  of  the  apparatus  and  its  chemical 
components.  The  correspondents  include  Frank  T.  Fowler  of  the  Life  Saving 
Devices  Co.,  supplier  of  the  rubber  mask  and  hose,  and  Edwin  Smith,  Jr.,  an 
experimental  engineer  working  for  Edison. 

All  of  the  documents  have  been  selected  except  for  a  few  routine  letters 
pertaining  to  shipments  and  some  printed  publicity  material. 

'  '  Hoy  4,  1917. 

Ur.  Prank  f.  Pooler,  ’ 

pres..  Life  Saving  Dovicos  Co., 


'  „  Washington,  D.  C. 

Dear  Bir:- 

" Che  rubber  mouth  -piece  and  head-strap 
arrived  safely  a  day  ago. 

Hr.  Edison  is  very  much  pleased  with  it 
and  would  like  to  sec  you  when  you  are  in  this 
neighborhood  in  regard  to  cooperation. in  supplying 

_  Yours  vary  truly,  ... 

Experimental  Engineer. 

May  14th,  1917. 

Mr.  Frank  T.  Fowler, 

’’res.  Life  Saving  Devices  Co., 

Hotel  Ebbitt, 

Washington,  D.C. 

Lear  Sir: 

In  compliance -wi  til  your  request  we 
have  sent  the  apparatus  t$y  Express  prepaid  to  Chicago. 

I  am  enclosing  copy  of  letter  and 
enclosures  sent  to  the  attention  of  Mr.  Jones.  If  any 
further  information  is  desired  I  will  be  glad  to  fur¬ 
nish  same,  or  if  necessary  could  undoubtedly  get  Mr. 
Edison's  permission  to  go  out  to  Chicago  and  talk 
matters  over  with  your  men. 

With  kindest  regards,  I  romain, 

Very  truly  yours, 

Experimental  Engineer. 


May  H th,  1917. 

Life  Saving  Devioes  Co., 
1 5 64  'Vest  Munroe  St., 
Chicago,  Ills. 

Attention:  Mr.  Jones: 

Dear  Sir: 

Mr.  Fowler  was  here  Friday  in  consultation 
with  Mr.  Edison  regarding  a  breathing  apparatus  we  made  up 
for  use  on  the  fire  control  platform  of  our  battleships. 

Following  Mr.  Fowler's  instructions  we  are 
forwarding  to  you  by  Wells  Fargo  Express  prepaid  one  box 
containing  articles  enumerated  in  Enclosure  Ho.  1. 

Eholosure  No.  3  contains  a  general  description  of  the  apparatus. 
Enclosure  No.  3  . ives  in  detail  the  method  we  worked  up  for 
loading  the  wire  supports. 

Enclosure  No.  4  contains  some  oomments  on  our  particular 
apparatus  and  several  suggestions  I  would  like  to  make  re¬ 
garding  changes  in  material,  and  method.of  manufacture. 

Trusting  the  information  will  be  definite 

enough  for  your  needs,  I  am, 

Very  truly  yours , 

4U> . 

Experimental  Engineer 


Enclosure  I.'o.  1. 

List  of  Articles  in  box  marked 
"Life  Saving  Levi oe s  Co., 

564  VV.  Hunroe  St., 

Chicago,  Ills. 

from  Laboratory  of  Ihos.  A.  Edison,  •- range,  L.J. 

?Jt0uth  pleoe ,  head  harness  and  rubber  tube. 
if2  Valve  box  with  triple  inlet  and  outlet  valves. 

$3  BBdy  of  apparatus  containing  filter  sponge  at  upper  end. 

#4  Cap  to  exclude  air  and  moisture  when  apparatus  is  not  in  use, 
j/5  cap  with  air  holes  to  fit  on  bottom  of  fZ  when  apparatus 
is  in  use.  ’ . 

=46  Valve  body  designed  after  kZ  using  slide  contact  in  place 
of  threads. 

and  //8  Cans  to  hold  spare  absorbing  charges  3-28  mesh  nickel 
plated  brass  wire  screens,  loaded,  cu**-  7- 
f<3  Box  to  hold  v/ire  rolls  white  oooliqg. 

*10  Caustic  melting  pot. 

£11  Soraper 

£12  Soreen  with  folding  supports. 

#13  Knife  with  specially  shaped  edge. 


•  Enclosure  'do.  2 

Description  of  Apparatus. 

The  container  (rf3)  oonsists  of  a  brass  tube  3"  in  diameter  w 1th  a 
wire  gauze  bottom  into  which  are  placed  three  of  the  rolls  of  .ire 
gauze  loaded  with  caustic.  The  filter,  a  brass  cup  with  wire  gauze 
bottom  slips  into  the  top  of  the  tube.  A  pieoe  of  sponge  whioh  may  be 
dampened  or  not  serves  as  a  filtering  medium  to  prevent  dust  and  . 
partioles  of  caustic  reaching  the  lungs.  The  valve  box  :52  screws  on 
to  the  top  of  the  tube  f3  and  has  the  end  of  the  rubber  tube  ;1 
attached  to  its  side  outlet.  A  clip  fastened  to  #3  fits  on  a  belt  so 
that  the  whole  apparatus  may  be  slung  around  a  man's  waist  in  a  similar 
manner  to  a  revolner.  In  use,  the  cap  § 5  is  attached  to  the  bottom 
of  f 3  to  prevent  moisture  and  di3solvet/ocustio  from  dripping  on 
clothes,  when  not  in  use  Cap  f’4  is  placed  on  end  of  ^3  making  an  air 
nd  moiBture  tight  joint  and  preserving  the  absorbent  charge  from 
deterioration.  The  value  box  i 2  contains  two  3ets  of  valves  of  three 
each.  The  lower  ones  (inhalatian  valves)  are  fitted  into  a  brass 
plate  which  is  held  in  place  by  a  tigfrt  fit  against  the  sides  of 
the  valve  box.  The  upper  set  (Exhalation  valves)  are  fitted  into  a 
brass  plate whioh  screws  into  the  top  of  the  valve  box. 

The  absorbent  material  is  hold  on  a  roll  of  wire  gauze  made  by 
rolling  a  pieoe  of  gauze  of  proper  width  end  length  with  a  piece  of 
felt  or  other  similar  material,  When  rolled  into  shape  the  felt 
is  pulled  out  and  the  roll  kept  in  shape  by  means  of  several  wires 
run  through  the  gauze.  The  oaustio  may  be  readily  removed  by  immersing 
the  . roll  in  hot' water  when  an  inspection  of  the  support  will  make  the 
above  description  clear. 

In  constructing  another  type  of  body  wo  wished  to  use  a  valve  in  whioh 
was  eliminated  and  the  joints  made  by  means  of  sliding 

all  sorew  work 


iCnoloauro  No.  2  (Oon't, 

fits.  'Tart  i 6  waa  the  result  and  It  la  sent  along  to  give  an 
idea  of  how  this  might  be  aooomplished. 


Enolosure  No.  3 

Method  of 

’■’reparing  Absorbent. 

The  wire  rolls  are  coated  with  cau3tio  soda  containing 
approximately  25$  water  and  75$  Ha  O.H. 

The  seamless  steel  nickel  plate a  can  is  filled  with  a  good 
grade  of  powdered  oaustid  soda;  (Red  Seal  lye)  water  is  added 
and  the  mixture  s birred.  As  the  volume  decreases  with  the 
solution  of  the  soda  more  oaustio  and  more  water  are  added,,  until 
3000  grams  (6  l/2  lbs.)  of  caustic  and  800  o.o.  (1  2/3  pints)  of 
water  have  been  put  into  the  can.  The  can  with  its  contents  is 
then  placed  over  a  Bunsen  burner  and  heated  up  to  170°-  180°  C 
with  occasional  stirring.  At  this  point  skim  the  froth  that  has 
risen  to  the  surfaoe.  A  skimmer  shaped  like  part  if  11  to  best 
adopted  for  the  purpose.  Unfold.:  the  legs  of  the  soreen  *12  and 
place  same  in  a  shallow  metal  or  orookery  dish,  lower  or  remove 
the  flame  so  as  to  keep  the  temperature  of  the  soda  solution 
around  160°  C.  Using  a  pair  of  crucible  tongs  grasp  the  wire 
roll  at  one  end,  holding  the  roll  in  a  vertioal  position  dip  into 
thh  melted  oaustio  and  immediately  withdraw.  Tap  the  roll  'on 
the  soreen  (#12)  to  shake  off  excess  oaustio  which  would  other¬ 
wise  form  in  balls  at  the  lower  end  and  clog  up  the  spaces  between 
the  wires.  Place  in  the  box  #9,  cover  and  leave  to 'co  d.  When 
cool  the  wire  roll  may  be  dipped  a  second  time  and  more  caustic 
nade  to  adhere.  If  necessary  a  third  dipping  may  be  made.  A 
knife  with  the  end  shaped  as  in  #13  will  be  found  very  useful  in 
breaking  off  the  lumps  of  oaustio  whioh  in  spite  of  every  care, 
will  occasionally  form  on  the  bottom  of  the  rolls  and  sto?  the  air 



'  Enolosture  No.  3  (Con't.) 

If,  thru  aooidant  the  oaustlo  adheres  in  too  largo  a  mass 
at  the  lower  end  of  roll,  dip  the  lower  half  inoh  of  roll  into 
the  hot  caustic  solution.  When  the  excess  has  melted  off  withdraw 
and  oo  ol. 

The  caustic  remaining  in  the  pot  after  coating  the  wire 
supports  may  be  used  repeatedly  by  adding  a  small  amount  of  water 
(100  o.o.)  before  adding  sufficient  soda  and  water  to  fill  oan 
and/  ‘Seating. 


Enclosure  H 


We  found" by  repeated  experiments  that  when  UBing  wire  absorbent 
supports  of  the  type  sent  it  was  necessary  when  breathing  heavily 
to  have. the  air  containing  half  a  percent  or  more  of  S02  pass  over 
at  least  10  inches,  linearly  of  caustic  soda,  to  remove  all  traoes 
of  the  gas. 

The  apparatus  was  made  up  of  brass  and  with  the  fine  screw 
threads  thru  a  mistake  on  the  part  of  the  draftsman;  In  the  rush 
of  other  matters  this  was  not  noticed  until  the  work  had  been 
a  third  oompleteJ  and  it  wbb  not  thought  wise  under  the  oiroumstanoes 
to  begin  over  again. 

The  valve  seats  were  originally  of  rubber  but  were  soon  changed 
to  -the  aluminum  rings  fastened  to  the  body  of  the  valve  with  a 
little  shellao. 

The  tube  connecting  the  mouth  pieoe  to  the  valve  box  should 
haws  a  cross  section  of  at  least  0.4  sq.  in.  preferably  0.5#  sq.  in. 
The  length  of  course  depending  somewhat  on  the  size  of  the  individual 
and  the  tubing  itself  ought  to  have  a  stiffer  wall  than  that  sent  yuu. 

In  regard  to  making  up  some  samples  of  the  apparatus  for  trial 
I  would  make  the  following  suggestions. 

1st  The  entire  apparatus  with  the  exception  of  the  valves  be  made 
up  of  thin  sheet  iron, then  tinned,  nickel  plated  or  coated  with  one 
of  the  E^icasite  preparations.  CauBtio  Soda  readily  attacks 
zinc  and  aluminum  so  that  neither  galvanized  iron  or  aluminum  ou£it 
to  be  used  for  parts  of  the  apparatus  coming  in  oontaot  with  the 
oaustio  soda.  It  is  particularly  important  that  no  galvanized 


Enclosure  #4  (Con't) 

iron  be  used  for  the  wire  rolls  or  any  part  that  oomes  in  oon 
taot  with  melted  soda.  We  have  found  that  either  iron  or 
brass  heavily  niokel  plated  answered  the  purpose  here  best. 

End  The  valve  seats  should  have  a  very  narrow  oontaot  surfaoe 
in  place  of  the  broad  flat  ring  shown. 

3rd  All  joints  should  preferably  be  of  the  sliding  oontaot 
kind  as  illustrated  in  the  way  the  top  valve  plate  fits  on  the 
valve  box  in  part  #6.  ’Share  necessary  a  modified  type  of  bayonette 
oatch  may  be  easily  adjusted  to  hold. together  parts  on  whioh  there 
is  any  strain,  a  rubber  or  fiber  washer  between  the  end  of  one 
pieoe  and  a  shoulder  on  the  other  piece  will  render  the  joint 
absolutely  gas  and  water  tight. 

August  9,1917 

Mr.  Frank  2.  Fowler, .  Pros., 

life  Saving  Dovices  Co., 

100  U.  Market  Stroot* 

Chicago,  111. 

Dear  Mr.  Fowler: 

The  first ‘port  of  May  laet,  after 
your  call  hero  at  the  laboratory,  X  cent  you  b” 
Xbqireua,  my  device  and  fall  details  regarding  a 
breathing  apparatus  I  had  made  up  for  use  on  the 
Fire  Control  Platform  of  our  Battleships.  . 

You  told  mo  it  was  just  the  thing  you 
woro  looking  for  and  would  immediately  look  into 
it  from  u  manufacturing  standpoint  and  lot  mo  Jmow 
what  progross  you  make.  . 

I  hnvo  not  hoard  from  you  sinco,  and  shall 
be  glad  to  know  whether  you  have  gone  into  the  matter 
at  all  and  nhothor  thoro  is  any  obstacle  in  your  wav 
that  I  can  possibly  eliminate.  Anyway,  let  mo  hoar 
from  you. 

Yours  very  truly. 

Sept.*  11,1917 

Mr.  i’ronk'  2. 


i’ov.lor.  Pres., 

8aving  lievieoe  Co., 

-  180  li.  Market  Street, 
Chicago,  Ill. 

Dear  air 

Mr.  Edison  cannot  underc tand  why  you  do 
not  answer  our  letters.  he  have  written  you  several 
times,  but  have  not  evon  had  the  courtesy  of  an 

Will  you  please  le,t  Mr.  -Edison  hear  from 
you  at  your  early  convenience. 

'fours  very  truly. 

Assistant  to  Mr.’  .Edison. 


JU  i Cl  J)  €t-'-CZJL>J  Co 

1  So 


h.  Tncui&M  <&£, 




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PnaJu..  <-'h 

A Xi(ti/yic-  /i> 

l \rvj\pUtyUuy-e.  lj<huy 
)hir  /Hi  mc.%  t£tJ&tu  /&- 

•  1  W  ^ 

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i9  OocLueih 

l  H  i  yrt 

CLvui-tiM Sj<  y 

-----  J$.4yv\.ciA  Ct ■  <5^ 

ytvc^i£c/c*Op  . 

Naval  Consulting  Board  and  Related  Wartime  Research  Papers 
Subjects  --  Direction  Finder  (1917) 

This  folder  contains  documents  pertaining  to  the  development  and 
testing  of  a  range  and  direction  finder  to  pinpoint  the  locations  of  airplanes  or 
cannon  fire,  using  multiple  microphones  to  pick  up  sound  transmitted  over 
land  through  the  air.  Included  are  reports  and  correspondence  addressed  to 
Edison,  written  by  experimenter  William  Deans  and  engineer  Newman  H. 
Holland.  Beginning  in  October  some  of  the  work  on  this  project  was 
conducted  at  Mineola  airfield  on  Long  Island.  Related  documents  can  be 
found  in  the  general  correspondence  folders  for  1917. 

Approximately  70  percent  of  the  documents  have  been  selected.  The 
unselected  documents  consist  primarily  of  unsigned  and  undated  rough 
technical  notes  and  drawings  and  shop  orders  for  parts  of  specific 

Mr.  Edison, 

V/ith  this  note,  I  am  asking  Mr.  Meadowcroft  to  hand  you 
my  report  on  work  in  connection  with  the  Direction  Finder,  which 
I  hope  will  receive  your  consideration. 

Should  you  wish  to  Bee  me,  concerning  this  work,  I  shall 
be  very  glad  to  keep  any  appointment  convenient  to  you. 


Minimum  versus  Zero  Sound  for  symmetrical  position  of  horns. 

Up  to  the  present,  difficulty  was  experienced,  In  determining 
the  direction  of  the  sound,  in  that  for  a  symmetrical  position 
of  the  horns,  an  indefinite  minimum  could  he  feund,  but  no  absolute 
ellimination  of  the  sound. 

During  some  of  the  tests,  I  closed  up  the  ends  of  the  horns  with 
cow  hair  pads,  and  then  listened  for  the  Klaxon.  A  sound  of  con¬ 
siderable  intensity  could  be  heard  for  any  position  of  the  detector. 
The  sound  was,  of  course  transmitted  directly  through  the  sides 
of  the  horns,  themselves.  To  overcome  this  difficulty,  I  made 
a  jacket  of  cow  hair  for  each  horn.  Repeating  the  above  tests, 

(  with  the  ends  closed  with  cow  hair) ,  nearly  All  the  sound  was 
elliminated.  With  these  jackets  on  the  horns,  when  the  horns 
were  in  the  symmetrical  position,  the  sound  was  almost  zero.  Of 
course,  with  these  cow  hair  jackets  on,  the  intensity  of  the  sound 
heard,  for  any  position  of  the  horns  is  less  than  with  out  the 
jackets,  but  the  advantage  is  gained,  that  in  the  symmetrical 
position,  the  sound  is  almost  nil,  instead  of  being  a  condition 
of  an  indistinct  minimum. 



With  the  apparatus,  as  I  received  it,  a  rotation  of  the  horns 
of  about  80  degrees,  (  40  degrees  each  way)  was  possible.  I, 
therefore,  arranged  the  apparatus,  so  that  the  whole  of  a  com¬ 
plete  revolution  qjight  be  investigated. 

In  general,  the  results  of  these  tests,  oyer  360°,  are  as 
follows.  There  are  more  than  one  zero  point  of  sound.  These 
equilibrium,  or  zero  points  occur  at  positions  of  the  horns, 

(1)  symmetrical  with  respect  to  the  source,  and  pointing  toward 
the  source,  (2)  symmetrical  with  respect  to  the  source  of  sound 
and  pointing  away  from  the  source,  (3)  at  Intermediate  points, 
the  location  of  which  depends  upon  the  fixed  angle  between  the 

(0  &  (83 

Sjurce  Source  Stuunc 

In  order  the  investigate  the  performance  characteristics  of 
the  apparatus,  I  had  the  Klaxon  set  up  at  various  distances,  and 
then  noted  the  relative  intensity  of  the  sound  heard,  throughout 
a  complete  revolution  of  the  detector  horns.  At  eaoh  distance, 
the  angle  Between  the  horns  was  varied,  and  the  same  investigation 
carried  on.  The  results  of  these  tests  were  ptit  into  the  form  of 
curves,  (  intensity  of  sound  against  position  of  detector,  set^,  fer 
each  fixed  angle  between  the  horns,  and  for  each  distance. 

Observations  were  made  at  distances  of  100,  200,  300,  400,  500, 
600,  and  700  feet.  At  each  of  these  distances,  a  curve  was  taken 
for  angles  between  horns  of  10,  45,  67  l/2,  and  90  degrees.  An 
attempt  was  made  to  obtain  a  curve  for  an  angle  of  180°,  but  without 
success.  The  sound  was  not  noticably  different  in  intensity 

throughout  a  oomplete  revolution  of  the  detector. 


For  constant  angle  between  the  horns,  the  curves  (sound 
intensity  vs.  position  of  horns)  were  the  same,  no  matter  what  the 
distance.  That  is,  the  curve  for  an  angle,  say  of  45  ,  is  the 
same  at  100,  200,  300,  etc  to  700  feet.  Therefore,  in  the  curves, 

I  show  only  one  curve  for  each  angle,  and  it  may  he  remembered 
that  for  this  particular  angle,  this  curve  holds  for  any  distance 
(up  to  700  feet,  as  tested). 

These  curves  are  shown  on  Curve  Sheet&No .  13  £, 3. 

The  importance  of  these  results  lies  in  the  fact  that  the  direo-. 
tion  of  sound  may  be  Incorrectly  determined  as  that  corresponding 
to  any  one  of  the  7ero  points  shown  in  these  curves. 

in  obtaining  these  curves,  I  knew,  before  hand,  which  was  the 
true  zero  position  (  symmetrical  position  of  the  detector.  After 
obtaining  data  for  the  curve,  however,  I  did  try  to  locate  the 
sound,  without  knowing  the  true  zero  position.  For  this  puspose, 

I  extinguished  the  light  in  the  booth,  in  order  that  I  might  not 
be  prejudiced,  by  noting  the  reading  of  the  scale.  In  order  to 
correctly  determine  the  direction  of  the  sound,  it  is  necessary  to 
be  able  to  recognize  the  proper  zero  point.  This  I  found  impossible 
to  do.  One  is  likely,  (  as  I  did)  to  decide  that  any  one  of  the 
zero  pdints  is  the  true  zero  point,  as  there  are  not  characteristics 
of  the  true  zero  position.  I  attempted  to  distinguish  it  by  first 
referring  to  the  curve  for  that  angle  between  horns,  and  then  noting 
the  relative  intensity,  and  length  of  humps,  but  this  failed  in  view 
of  the  fact  that  a  variation  in  the  direction  or  velocity  of  the 

Wlnd  causes  such  a  variation  in  the  Intensity  of  the  sound  heard 
as  to  frustrate  any  attempt  to  recognize  the  true  zero  position  by 
these  means. 

The  intensity  of  the  sound  in  the  region  where  the  horns  are 
pointed  away  from  the  source  is  not  very  different  from  that,  where 
the  horns  are  pointed  toward  the  source.  In  the  first  case,  the 
intensity  is  somewhat  less,  but  the  difference  is  very  smalll  With 
the  air  still,  the  two  regions  may  be  distinguished  after  consider¬ 
able  trial. 

The  smallest  angle  between  horns  is  less  open  to  the  objection 
of  a  number  of  zero  points,  than  are  the  larger  angles.  For  the 
larger  angles,  the  number  of  zero  points  is  large.  At  the  same 
time,  the  possible  error  in  determining  the  direction  is  greater 
with  the  small  angles,  than  with  the  larger  (if  the  true  zero 
position  be  known)  due  to  the  fact  that  with  the  smaller  angles, 
the  curve  of  intensity  against  position  is  flatter  than  for  the 
larger  angles. 

For  the  smalWangles,  the  Intensity  of  the-  sound  heard,  for  any 
position  of  the  detector  is  greater  than  the  intensity  for  the  same 
position,  using  the  larger  aggie,  although  the  difference  is  not 

On  curve  sheet  No. 4,  I  have  shown  a  surve ,  which  gives  the 
location  of  the  first  zero  Joint,  from  the  symmetrical  position 
of  the  detector.  This  curve  shows  that  for  very  small  angles, 
the  distance  to  the  first  zero  point  is  large,  and  therefore,  would 
seem  to  indicate  that  the  smaller  angle  is  better. 

Reasoning  on  the  basis  of  the  arrangement  of  the  hearing  apparatus 
on  the  human  head,  I  tried  to  perfect  the  apparatus  by  lmmitatlng 
the  human  device.  Accordingly,  I  placed,  between  the  horns  what 
corresponds  to  the  forward  part  of  the  head,  a  sound  barricade,  or 
nose,  composed  of  a  sheet  of  Beaver  Board,  covered  on  both  sides  with 
a  thickness  of  cow  hair.  This  was- an  attempt  to  elliminate  the 
undesirable,  extra  zero  points.  I.  then,  took  curves  as  before 
and  found  that  they  were  the  same  as  without  the  nose,  or  barricade. 
Hence,  this  method  is  not  effective. 


in  carrying  on  these  tests,  I  worked  out  from  100  feet  toward 
the  greater  distances.  The  greatist  distance,  at  which  any  results 
can  be  obtained  at  all  is  700  feet.  The  intensity  of  sound  is  not 
great,  even  at  the  smaller  distances,  but  at  700  feet,  (  and  part 
of  the  time,  at  600  feet,  according  to  the  wind),  the  sound  is  so 
faint,  that  one  must  hold  his  breath  to  hear  it.  At  this  distance, 
the  noise  of  breathing,  in  the  closed  booth  is  actually  so  loud,  as 
compared  to  the  external  sound  in  the  receivers,  that  I  had  to  stop 
breathing  for  a  time,  each  time  I  attempted  to  make  a  comparison 
of  the  relative  intensities  of  the  sounds  for  different  positions 
of  the  detector. 

No  sound  at  all  could  be  heard  at  800,  and  900  feet.  When  the 
wind  was  blowing  toward  the  Klaxon,  and  away  from  the  booth,  no  re¬ 
sults  could  be  obtained  even  at  600  feet.  On  certain  days,  also 
I  have  found  it  impossible  to  hear  at  500  feet. 

In  attempting  to  improve  the  range  of  the  apparatus,  I  elevated 
the  detector  on  a  tower,  sixteen  feet  high.  This,  however,  did 


increase  the  intensity  as  compared  with  that  when  the  apparatus 
was  mounted  on  a  3ft. 6"  stand.  700  feet  remained  the  limit. 


The  Japanning  on  the  diaphragms  is  thicker  on  one  Bide  than  it 
is  on  the  other.  It  seemed  to  me  that  this  difference  would  in¬ 
terfere  with  the  finding  of  a  true  zero.  I  then  reversed  the 
diaphragm,  but  the  zero  point  was  located  at  the  same  point  as  before 
as  closely  as  it  can  be  read. 

I  then  tried  a  diaphragm  from  which  all  the  japanning  had  been 
removed.  There- was  practically  no  change.  If  anything,  the  in¬ 
tensity  was  slightly  less  with  this  diaphragm  in  the  apparatus. 

Next,  I  tried  increasing  the  clearance  between  the  magnets  and 
the  diaphragm,  by  inserting  paper  washers.  Results  same  as  with 
standard  diaphragm.. 

Then,  I  tried  a  double  thickness  diaphragm.  Two  standard  dia¬ 
phragms  were  stuck  back  to  back,  by  means  of  an  oil  film.  With 
this  arrangement,  the  intensity  of  sound  was  increased  slightly,  btit 
the  general  performance  of  the  apparatus  was  the  same  as  that  outlire 


In  accordance  with  your  suggestion,  I  had  built  an  apparatus,  in 
which  the  diaphragms  are  separated,  but  connected  by  means  of  a  rod 
fixed  to  their  respective  centers.  Up  to  the  time  of  writing  this 
report,  however,  I  have  been  unable  to  get  any  results.  In  making 
up  the  apparatus,  I  had  the  rod  fixed  to  the  diaphragm  by  means  of 

shellac.  In  attempting  to  make  an  adjustment,  this  cement  did  not 
hold,  and  the  rod  was  loosened.  Now,  I  am  having  the  apparatus 
repaired,  tut  am  having  the  rod  riveted  into  the  diaphragm. 

Before  the  rod  had  become  loosened,  I  tried  out  the  arrangement  by 
listening  for  words,  spoken  into  one  horn.  I  could  not  hear  anythirg„ 
As  soon  as  the  apparatus  is  repaired,  I  shall  continue  the  tests. 


The  sound  heard  in  the  receiver  (head  set)  does  not  correspond 
with  the  sound  of  the  Klaxon.  The  sound  heard  in  the  receiver  is 
a  tone  of  high  pitch,,  very  much  like  the  tone  heard  in  the  receiver 
of  a  wireless  telegraph  outfit. 

It  is  possible  that  the  performance  of  the  apparatus  will  be 
different  for  different  wave  lengths,  and  therefore  for  #=$?#### 
sounds  from  different  sources.  The  determining  factor  so  far  as 
the  performance  is  concerned  seems  to  be  the  arrangement  of  the 
horn6,  which  would  seem  to  indicate  that  the  wave  length  has  a  good 
deal  to  do  with  the  behavior  of  the  apparatus. 

It  might,  therefore,  be  of  advantage,  to  test  the  apparatus 
using  a  source  of  sound  of  a  character  different  from  that  of  the 
Klaxon,  say,  a  large,  vibrating  electric  gong. 

Respectfully  submitted, 

July  7,  1917, 


1.  providing  the  home  with  cow  hair  jackets  permits  of  find¬ 
ing  a  point  approaching  absolute  zero  of  sound,  rather  than  an 
indefinite  minimum. 

2.  Symmetrical  position  of  the  horns  is  not  the  only  position 
at  which  a  zero  of  sound  may  be  found. 

Zero  points  are  of  three  kinds,  viz., 

(1)  symmetrical  position.  Horns  pointing  toward  Source 

(2)  »  "  »  "  "  away  from  " 

(3)  positions,  between  these  two,  the  location  of  which 

depends  upon  the  angle  between  the  horns. 
g.  Number  o{  zero  points  depends  upon  the  angle  between  the 
horns,  being  smaller,  for  smaller  angle. 

possible  error  with  small  angle,  therefore  greater,  due  to 
fact  that  curve  is  flatter. 

4  .  impossible  to  distinguish  true  zero  position,  from  extra 
points  of  balance,  (as  under  (3),  above). 

Providing  apparatus  with  a  "Nose1'  does  not  correst  for  this, 
_jj.  performance  of  apparatus  depends  only  upon  angle  between 
the  horns,  and  not  upon  distance.  Decrease  in  accuracy  at 
greater  distances,  due  to  fact  that  curve  ef  intensity  -  position 
of  horns  is  flatter. 

6.  Maximum  range  of  apparatus  is  700  feet,  in  still  air. 

With  wind  blowing  against  direction  from  which  sound  comes, 

range  is  decreased  to  500  feet. 

Elevating  apparatus  does  not  increase  range  appreciably. 

7.  Using  diaphragm  composed  of  two  standard  Diaphragms,  results 
slightly  better. 

SUMMARY  (  Continued) 

8.  Probable  that  performance  of  apparatus  will  differ  with 

different  wave  lengths  of  soUnd. 

'Tl rjSjlittA7v  obiauJ- 




Wm.  Doans. 

July  12,  1917, 

Orange,  N.J. 

July  12,  1917. 

Mr.  Edison, 

Through  Mr.  Meadowcroft,  1  am  submitting  to  you  a 
report  on  my  work  since  my  handing  in  the  previous  report. 

The  report,  herewith,  is  really  a  supplement  to  that  of 
July  8th.  I  am  anxious  that  you  know  of  the  experiments,  herein 
described,  before  my  conference  with  you,  so  I  supplement  my 

report  of  four  days  ago  with  this. 

'YCkMlAAIV  XT'O+lA  ■ 


In  accordance  with  your  suggestion,  at  our  last  meeting, 

I  had  built,  an  apparatus,  in  which  the  two  diaphragms,  used 
were  separated  about  three  inches,  and  then  were  connected, 
mechanically  by  means  of  a  rod.  I  had  two  such  devices  made, 
one  in  which  the  regular  Bell  receivers  were  used,  and  the  otha? 
in  which  the  ring-pole  type  of  receiver  was  used.  The  results 
in  both  cases  were  the  same.  I  tried  each  by  listening  for 
words  spoken  into  first  one  horn,  and  then  the  other?  In 
neither  case  eould  I  hear  anything.  Upon  applying  the  Klaxon, 
directly  into  one  horn,  and  directly  in  front  of  it,  I  could 
hear  it  but  not  very  loudly. 

I  then  had  the  Klaxon  set  up  at  100  feet,  and  attempted  to 
investigate  the  behavior  of  the  apparatus.  .The  sound,  even 
at  this  short  distance,  was  so  extremely  faint,  that  anything 
like  an  investigation  of  the  performance,  was  impossible. 

Thinking  that,  perhaps,  in  the  assembling  of  the  apparatus, 
or  in  the  transportation  to  the  place  of  test,  the  apparatus 
had  gotten  out  of  adjustment,  to  the  extent  of  placing  one  or 
both  of  the  diaphragms  under  strain,  I  tried  .ad justing  to 
correct  for  this.  The  results  were  as  before,  however. 

To  test  out  the  effect  of  tjie  connecting  rod,  I  then,  took 
out  the  diaphragm  and  half  the  rod  from  one  receiver.  (  Otor 
convenience  in  assembling,  the  rod  had  been  made  in  two  pieces, 
which  could  be  screwed  together.)  Into  this  receiver,  I  put 
a  standard  receiver  diaphragm.  I  then,  compared  the  results 

talking  first  into  the  receiver  with  the  standard  diaphragm 
and  then  into  that  to  whose  diaphragm,  the  half  rod  was  still 
attached.  The  rod  hole  in  the  cup  was,  of  course  stopped  up 
for  this  test.  The  standard  receiver,  »f  course,  transmitted 
satisfactorily.  The  receiver  to  whose  diaphragm  the  rod  was 
attached  did  not  transmit  at  all. 


5  rod  and  diaphragm  from  the  other  i 

and  in  their  place  put  a  standard  diaphragm  in  the  other  re¬ 
ceiver.  I  had,  then  two  standard  receivers,  to  each  of  which 
a  hprn  was  connected.  The  diaphragms  of  these  receivers  were 

scted  together,  by  any  rod  < 

Electrically,  I 

nected  the  receivers  in  oppostion,  through  the  head  set. 
ia,  I  had  the  same  set  up  as  before,  except  that  I  had  m 

connecting  rod. 

With  this  apparatus,  it  IS  possible  to  locate  a  zero  point, 
The  complete  performance  of  this  apparatus  is  as  sfeown  in  the 
curve,  bSlow.  The  sound,  in  this  arrangement  is  not  nearly 
so  loud  as  with  the  old  balanced  diaphragm  arrangement. 


For  use  with  this  arrangement  of  apparatus,  I  constructed  a 
switch  fcy  means  of  which  any  of  the  following  connections 
could  he  made, 

(1)  Two  receivers  connected  in  oppostion  to  head  set. 

(2)  Left  receiver  connected  to  head  set. 

(3)  Right  receiver  connected  to  head  set. 

| 4)  Left  horn  connected  to  left  receiver  of  head  set. 

Right  horn  connected  to  right  receiver  of  head  set. 

By  means  of  connection  (4),  I  aimed  at  accomplishing  the 
effect  of  having  my  ears  at  the  detector,  each  horn  connected 
to  the  respective  ear.  Turning  the  detector  would  then  he 
like  turning  my  head.  I  thought  to  locate  the  true  zero 
point  hy  adjusting  for  the  point  where  the  intensity  of  sound 
in  eoh  ear  was  the  same.  After  refinements,  the  detector 
would  then  he  simply  very  sensitive  ears. 

Upon  trying  this  out,  however,  I  was  troubled  hy  finding 
several  zero  points,  and  as  I  pointed  out  in  my  last  report, 
the  true  zero  point  could  not  he  distinguished  from  the  others. 


It  seems  to  he  that  the  balanced  diaphrgam  apparatus  we  have 
been  using  up  to  the  present  is  of  incorrect  design.  The 
apparatus  turnfed  over  to  me  consisted  of  two  receivers  acting 
on  one  diaphragm.  The  horns  were  connected  to  the  cups  of 
the  respective  receivers.  The  receivers  were  electrically 
connected  in  opposition,  through  the  head  set. 

A  butter  arrangement.  In  my  opinion  would  be  to  use  a  balanoec 
diaphragm  as  before,  but  use  only  one  receiver.  Now,  when  the 
impulses  on  the  diaphragm  are  balanced,  (  and  occur  at  the  same 
time),  which  condition  should  obtain  for  symmetrical  position 
of  the  horns,  the  diaphragm  will  not  move,  being  subjected  to 
equal  and  opposite  forces.  For  other  positions  of  the  horns, 
there  should  be  an  unbalancing,  and  therefore  movement  of  the 
a  i  B-nhracm .  hence  noise  in  the  head  set,  which  is  connected  to 

diaphragm,  hence  noise  in  ti 
this  one  transmitterSreceivi 

Of  course ,  the  two  chambers 

should  be  made  as  nearly  alike  as  possible.'*' 

I  should  therefore  li^e  to  try  out  such  an  arrangement. 

As  nearly  as  I  could  come  to  this  arrangement  with  the  appar 
atus  at  hand  was  to  connect  the  head  set  to  only  one  of. the 
horn  receivers.  The  results  obtained  may  not  apply  to  the 

will  not  be  the  same.  I  cannot  see  what  effect  the  presence 
of  the  other  inactive  magnet  would  have  on  the  results.  I 
would,  however,  like  to’  try  the  scheme,  using  only  the  one 
magnet.  The  results  obtained  were  as  shown  in  the  curve  beloi 


The  results  with  the  single  receiver  are  better  than  .those 
with  the  two  receivers  connected  in  opposition  in  the  following 

(1)  There  are  fewer  zero  points. 

(2)  The  region,  where  the  horns  are  pointing  toward  the  source 
is  readily  distinguishable,  the  intensity  of  sound  for  this  post 
tion  being  greater  than  for  any  other  position  in  the  360  degrees. 

Atmospheric  conditions  were  such  that  300  feet  wag.  the 
greatest  range  at  which  results  could  be  obtained.  At  this 
distance,  the  zero  point  was  located  with  considerable  more 
trouble  than  at  the  shorter  distances. 

I  had  the  Klaxon  set  up  at  100  feet.  V/ith  the  light  in  the 
booth  extinguished,  I  found  it  an  easy  matter  to  correctly  locate 
the  true  zero  point.  This  seems  to  indicate  that  the  distance 
can  be  increased  by  increasing  the  sensitiveness  of  the  appara¬ 
tus,  and  that  the  accuracy  of  this  arrangement  is  better  than 
with  the  other  arrangements. 

Respectfully  submitted, 

July  12,  191V. 

yf^  A4u.  VrJUo^cJt-  tL*  Ctr*K. 

ft&iXL  cvu.  h*so 

ydk^  ^Tfcfct 


y^^eru^i^s^-ea).  Jitiionifl  7ttii-  cl^fVUikdL  . 

July,  14th,  1917/\\ 

Mr.  T.  A.  Edison: 

Subjeot;  Keport  on  order  #5013. 

In  order  to  bring  this  report  up-to-date,  I  am 
attaching  herewith  some  tables  showing  aotual  results 
which  we  obtained  and  which  are  characteristic  of  what 
might  be  expected  under  favorable  conditions. 

With  the  exception  of  the  records  made  with  Dynamite 
these  records  were  all  obrained  when  there  was  little  or 
no  wind,  or  where  the  wind  was  favorable. 

When  dynamite  was  used  as  the  souroe  of  sound,  you 
will  note  that  we  obtained  a  very  fair  degree  of  accuracy, 
with  a  300  ft.  base  line,  and  these  reoords  were  made 
under  wind  conditions  that  varied  to  such  an  extent  that 
we  were  unable  to  get  any  consistent  records  with  the 
shot  gun.  This  would  seem  to  indicate  that  aB  the  energy 
of  the  sound  increases,  the  less  distortion  takes  place, 
due  to  the  effect  of  the  wind. 

There  were  a  great  many  handicaps  in  making  tests, 
due  to  the  fact  that  if  the  wind  is  not  favorable,  we 
oannot  make  a  definite  enough  record  from  long  distanoe 
points  to  enable  us  to  read  them  accurately  This  might 
"be  overcome  by  the  development  of  a  specially  sensitive 
Microphone,  or  the  introduction  of  an  amplifier. 

We  have  been  unable  to  make  many  reeordB  from  the 
1  lb.  gun.  due  to  the  fact  that  it  was  being  used  for  other 
tests.  When  the  gun  was  located  at  Nesbitt’s  Farm,  we  were 
unable  to  get  an  unobstructed  range  of  more  than  1,000  ft., 
and  at  its  new  looation  the  local  conditions  are  such  as 
to  make  it  very  difficult  to  establish  a  satisfactory  base¬ 


We  made  some  preliminary  tests  to  determine  the 
transmission  of  sound  through  the  earth,  using  as  you 
suggested,  a  Microphone,  the  back  electro  of  which  was  re¬ 
tarded  by  means  of  a  heavy  suspended  weight  on  the  Prin¬ 
cipal  of  a  Siesmograph.  With  this  arrangement  the  sound 
of  a  person  walking  in  the  grass  50  to  75  ft.  away  ^as 
plainly  audible,  but  using  a  shot  gun  as  a  souroe  of  sound, 
we  found  it  impossible  with  our  present  arrangement  to 
oommunioate  the  vibration  to  the  earth  and  insulate  the 
Microphone  from  the  air  vibrations. 

Ab  it  would  require  considerable  fitting  up  to 
continue  testa  on  sound  through  the  earth,  we  are  letting 
this  study  rest  for  the  present. 


We  have  oonsidered  the  following  possible  sources 
of  errors  with  a  view  of  obtaining  greater  aoouraoy. 

1.  In  the  Recording  Maohine. 

(a)  The  exaot  lining  up  of  the  recorder  point. 

(b)  Changes  due  to  meohanioal  weakness  in  the  maohine. 

(o)  Changes  due  to  variations  in  speed  of  mandrel. 

(d)  Variations  in  time  element  of  magnetio  recording. 

As  we  have  a  heavily  constructed  maohine  with  Mioro- 
meter  adjustnant  of  the  recorders,  and  a  powerful  spring 
motor,  we  believe  that  there  are  no  appreciable  errors 
intro duo ed  in  the  recording  apparatus. 

£.  Errors  in  the  Miorophone. 

(a)  Variation  in  time  element  in  the  Microphone. 

(b)  Variation  in  degree  of  sensitiveness  of  the  Miorophone. 

As  all  the  Microphones  are  made  with  exaotly  the  same 
thiokness  of  diaphragm  and  constructed  the  same  in  every  way, 
which  is  also  true  of  the  reoorder,  the  time  element  should 
not  out  any  figure  in  the  results.  A  variation  in  sensitive¬ 
ness  of  the  Miorophone  might  affect  the  results,  inasmuch 
as  one  Microphone  might  respond  to  the  first  impulse  of  the 
sound  wave,  where  another  would  not,  the  first  impulse  app¬ 
arently  not  being  that  having  the  greatest  energy. 

3.  Errors  in  reading  its  record. 

(a)  Aoouraoy  of  maohine  mechanically 

(b)  Mininum  reading  points  with  present  scale 

(o)  Locating  the  exaot  point  of  start  of  a  sound  wave. 

With  the  present  apparatus  it  is  possible  to  accurately 
measure  distances  on  the  oylinder  to  within  .0018",  which 
represent  .00014  Second*,  an  interval  of  time  in  which  the 
sound  wave  would  only  travel  about  .165  ft. 

It  is  easily  possible  to  arrange  the  scale  so  as  to 
read  within  one  half  a  thousandth  of  an  inch  on  the  cylinder, 
but  this  would  not  be  of  any  help  to  us,  due  to  the  fact  that 
the  sound  wave  Itself  has  not  a  definite  enough  starting  point 
to  allow  us  to  read  this  olose. 

We  are  using  a  hair  line  in  the  eye  piece  of  the 
Miorosoope  to  locate  the  points,  as  we  find  we  can  use  this 
with  a  greater  degree  of  aocuraoy  than  having  hair  lines  on 
the  oylinder,  even  when  using  a  silk  fibre,  and  it  is  very 
much  quicker  and  easier  to  handle. 

The  Miorosoope  is  adjustable  in  two  directions  with 
micrometer  screws  and  can  be  very  aoourately  Bet,,  so  that  we  do 
not  believe  there  is  any  error  introduced  in  the  mechanical  con¬ 
struction  of  our  record  reading  device. 

The  greatest  source  of  error  18  the  exact  location  of 
the  starting  of  a  sound  wave.  This  depends  largely  upon  the 
character  of  reoords  we  get,  and  also,  requires  some  skill  and 
experience  on  the  part  of  the  observer. 


(a)  Variations  due  to  ohange  in  speed  of  sound 

affeoted  by  wind.  .  _  . 

(b)  Variations  due  to  the  distortion  of  the  sound 
waves  by  wind. 

(o)  Variations  due  to  the  reduction  in  volume  or 
in  tensity  of  the  sound  due  to  wind. 

If  the  wind  is  at  least  fairly  steady,  its  effeot 
on  the  speed  of  sound  oan  be  practically  allowed  for.  The 
effeot  of  distortion  and  decrease  in  volume  are  apparently 
our  greatest  souroeB  of  error,  but  as  the  energy  of  the  Bound 
increases,  our  tests  seem  to  indicate  that  these  errors  are 


36Ur0b  off  sotiuf)  aMT> 

We  have  not  made  any  very  extensive  tests  on  the 
effeot  of  obstructions,  but  our  tests  seem  to 
creasing  the  height  of  the  horn  above  the  earth  gave  more  ur 
iform  results. 


6#  the  srerd  og  sound  Tirmn 

In  still  air  the  speed  of  sound  Is  affected  by 
(a)  the  temperature,  (b)  the  humidity,  to)  the  barometer 
pressure.  The  temperature  has  the  greatest  Influence  on 
the  speed  of  sound,  and  we  find  that  by  taking  the  speed 
of  sound  at  1090  ft.  per  second  at  freezing  temperature, 
and  adding  1  ft.  inorease  in  speed  for  every  degree  fahrenheit 
rise,  that  we  get  very  close  results.  A  slight  error  in 
eatin&ting  the  speed  of  sound  does  not  greatly  affect  the 
final  results. 

7.  ERRORS  DOE  TO  : 


The  source  of  sound  may  introduce  some  errors  as  in 
the  case  of  a  large  gun,  as  the  compression  of  the  air  and  the 
heating  of  the  air  near  the  gun  will  inorease  the  speed  of  sound. 
This  however,  extends  for  suoh  a  short  distance,  that  it  is  not 
likely  to  have  a  material  effect  on  our  resultB.  This  error 
also  oan  be  very  olosely  figured  and  allowed  for,  if  neoessary. 


(a)  Determination  of  exaot  speed  of  the  cylinder 
at  the  time  of  taking  the  record. 

(b)  Effect  of  the  length  of  base  line  to  the  distance 
of  the  source  of  sound. 

(o)  Effect  of  the  angle  to  the  point  of  the  souroe  of 
sound  with  the  base  line. 

The  speed  of  the  recording  surfaoe  oan  be  very  olosely 
determined  by  recording  the  vibrations  of  a  tuning  forfc  having  a 
known  period.  We  are  using  a  pitch-pipe  (Upper  "C )  which  has 
been  carefully  tested  with  a  standard  tuning  fork,  and  we  believe 
from  our  test  that  we  are  sufficiently  accurate  on  this  point. 

The  longer  we  have  the  base  line  the  more  aoourate  our 
results,  and  it  would  seem  that  for  ue  to  figure  olosely,  the  base 
line  should  be  somewhat  on  the  order  of  one  sixth  as  long  as  the 
greatest  distance  we  expect  to  measure. 

Our  greatest  accuracy  oan  he  obtained  when  the  souroe  of 
sound  is  on  a  line  at. right  angles  to  the  base  line,  and  if  the 
angle  is  less  than  45°,  slight  errors  in  reading  the  cylinder  have 
a  much  greater  effeot  in  final  results. 


prom  our  experience  it  would  seem  that  the  only  souroea 
of  error  that  are  serious  and  that  we  have  yet  been  able  to  take 
oare  of  are  those  due  to  the  effects  of  the  wind  and  to  getting  a 
definite  starting  point  for  the  sound  waves.  Most  records  have 
been  taken  with  cylinder  running  about  100  R.P.M.,  Jfttjte  can  in¬ 
crease  this  speed  to  160  without  increasing  the  difficulty  of 
reading  the  reoords  if  the  energy  of  the  sound  is  enoughtc. 

to  make  deep  impressions.  HOLLAND. u* 

E::a-nploa  of  Hecorda  made'  at  Different  Distanooo 
owing  the  overage  Percent  Errors. 

poet  -  300  Voot  Dasc-Lino. 

’  1128  '  2-08 
1160"  -89 

1150  .43 

1172  1-7 

1175  2.0 

1158  ■ 52 













b  Cun  at  2960  Pect  -  600  ¥t., JHaao-Dlno . 

- - Tf3mc: -  per  po aT Error 




.017  . 


Hen  or  d  IIo. 

Cun  at  2960  Feet  -  600  Ft  Baae-Llne.^ 

Pis  tanoo 

..  027 



Shoot  //£. 

TEST  FOE  1  Pdr.  OAilHOII 

r?ooo rci  IIo. 
— I - 

#7.  4 





~37IT5 - 







Base-Line . 

Per  ocnt  Error. 

4 . 03 

4 . 76 


-  -  300  FT.  BASE-UIfii. 

3E30P.D  ITO. 

Distance.  Error. 

si to -  snr 

"066  94 

2975  15 

2942  18 

3000  40 

perOcnt  Error. 




Subjeot:  Order  #5013. 

Our  efforts  since  last  report  have  been  mainly 
devoted  i*>to  proouring  meanB  that  would  give  us  a  sufficient 
volume  of  sound  that  oould  be  reoorded  at  least  one  mile  from 
its  source. 

We  experimented  with  dynamite  (40$  dynamite)  using 
from  one  to  ten  sticks  at  a  time,  and  we  tried  out  the  larger 
size  of  saluting  bombs  shot  from  a  mortar  suoh  as  are  used  in 
firework  exhibits. 


The  use  of  dynamite  as  a  source  of  sound  was  fairly 
satisfactory,  but  even  with  this  when  the  wind  was  blowing  against 
us,  we  were  unable  to  get  satisfactory  records  a  mile  distant  from 
the  horns,  and  the  sound  dia  not  increase  directly  as  the  amount  of 
dynamite  used,  although  of  course  there  was  an  increase  of  sound 
the  greater  the  quantity  of  dynamite  fired  off.  The  objection  to 
the  dynamite  is  the  time  required  to  prepare  a  charge  for  firing, 
and  the  fact  that  the  only  praetioal  way  is  to  explode  it  on  the 
ground,  which  appears  to  be  a  bad  position  for  the  source  of  sound, 
the  tall  grass  seeming  to  muffle  the  sound. 


We  tried  out  half  a  dozen  bombs  as  supplied  by  the 
Firework  Manufacturing  Companys  and  found  that  they  made  a  noise 
that  oould  readily  be  transmitted  for  a  mile  or  more,  even  against 
adverse  wind  conditions.  As  these  bombs  were  shot  straight  up  in 
the  air  by  the  morter,  we  believed  we  oould  figure  the  distance 
correctly,  but  we  found  that  we  oould  not  properly  estimate  the 
height,  and  that  the  bomba  were  carried  by  the  wind  so  that  they  were 
not  of  much  value  to  us  in  oheoking  our  reoords  aoourately. 

Mr.  Hayes  finally  auooeeded  in  borrowing  a  saluting 
cannon  from  the  Bloomfield  Battery,  and  this  we  now  have  in  position 
on  the  Range.  This  gun  fires  from  12  to  15  ounces  of  black  powder, 
and  makes  a  noise  which  we  oonsider  very  muoh  greater  than  the  1  lb. 
gun  we  formerly  experimented  with.  The  noise  produced  by  the  gun 
does  not  depend  so  muoh  upon  the  charge  of  powder,  as  upon  the  proper 
ramming  of  the  oharge. 

We  Just  have  started  to  make  teBtB  with  this  gun  and 
attaoh  the  results  of  some  reoords  that  we  have  obtained,  which  show 
a  very  good  degree  of  aoouraoy  for  a  600  ft.  base  line. 

The  position  for  the  gun  is  not  quite  one  mile  from  the 
horn,  but  was  the  moet  satisfactory  looation  that  we  oould  obtain, 
owing  to  the  nature  of  the  terrene. 

ET  N 

F.  H.  Holland. 


600  Ft. 


Nn.  of  Record.  Ho.  of  Ft. 

Percent  Error. 











•  9.0 
35:  0 
























It  will  be  noted  that  while  Borne  of  the  reoords 
are  quite  a  peroentage  out,  the  average  of  the  9  shots  show 
less  than  1$  Error. 

A  praotioal  method  of  treating  these  observations 
would  be  to  omit  reoords  that  are  obviously  inconsistent  aid 
take  the  average  of  the  others. 

This  method  applied  to  above  would  make  the  Error 
1.56$  -  not  so  good  in  this  case,  but  likely  to  be  truer  in 
most  oases. 


H.  H.  Holland. 

August  7th,  19X7. 

Mr.  Thomas  A.  Edison: - 
Report  on  Order  #5013. 

The  development  work  on  this  order_  of  Iasi:  week 
has  teen  devoted  to  getting  a  single  contaot  Microphone  that 
would  give  a  tetter  impression  on  the  wax  and  that  would 
permit  a  uniform  adjustment. 

We  have  made  up  some  miorophones  with  lamp  Blaok 
Buttons  in  different  forms  but  our  experiments  at  the  "Range" 
were  unsatisfactory  due  to  changes  in  the  alignment  of  the 
Stylus  points,  caused  ty  the  heat  softening  the  wax  hy  which 
they  were  attached.  We  are  developing  Recorders  with  diff¬ 
erent  retaining  means  for  the  Stylus  which  will  he  mechanically 
better  and  permanent.  These  we  will  check  up  with  our  best 
present  Recorders.  As  it  is  difficult  to  have  uniform  con¬ 
ditions  at  the  "Range",  we  propose  to  make  our  check  tests 
on  Recorders  and  Miorophones  in  the  Kinetophone  Building  here. 
When  the  desired  results  are  obtained,  we  will  continue  our 
tests  at  the  "Range". 

We  have  put  up  another  Tower  at  the  "Range"  and 
measured  off  a  1200  Ft.  base-line.  We  are  making  some  tests 
today  on  this  to  prove  til-greater  degree  of  accuracy  obtainable 
with  a  longer  base-line. 


II.  H.  Holland. 

August  7th,  1917. 

Mr.  Thomas  A.  Eaison:- 

As  Mr.  Durand  is  holding  a  Convention  of  his 
dealers  this  week  and  there  are  a  number  of  new  things 

”i  ir 

Bxji;  =s--\2rs sss^srsan  sg. 

Contact  Microphones. 

AS  vou  know  Mr.  Hayes  is  taking  his  vacation  the 

SiTS'tSs  ‘y 

layed  your  study  of  this  case. 


H.  H.  Holland. 

report  on 

direction  detector 

William  Doans 
ABC*  15,  1917. 

East  Orange,  N.J. 
August  15,  1917. 

Mr.  Edison, 

I  am  submitting,  herewith  another  report  on  the 
Direction  Detector. 

I  have  had  some  very  good  results  with  a  balanced-diaphragm 
apparatus,  in  which  microphones  were  used.  In  view  of  this 
success,  I  believe  that  I  am  ready  to  try  out  the  apparatus 
at  Mineola,  of  which  you  spoke  the  other  day.  I  understood 
then,  that  you  would  obtain  a  pass  for  me  to  the  grounds  at 

If  you  agree:withrme  that  it  would  be  well  to  try  out  the 
apparatus  at  Mineola,  may  I  ask,  that  you  please  obtain  the  pass 
for  me. 


ids  ■ 

40  JUtAAa. 

h©  . 

40  Jut.  jfv  utufay  sujtefiZvi  ^ 


in  our  last  interview,  you  suggested  an  apparatus,  consisting 
essentially  of  a  valve,  by  means  of  which,  either  horn  could  be 
connected  to  the  listening  tubeB.  The  hornB  were  then,  to  be 

rotated  until. a  sound  of  equal  intensity  was  observed  in  each 
horn.  The  general  construction  of  the  valve  was  as  shown  in 
the  sketch,  below. 

TESTS  in  working  with  this  apparatus,  I  first  connected  the 
valve  to  the  horns,  by  means  5f  rubber  tubes.  With  this 
arrangement,  trouble  was  experienced  by  the  kinking  of  the  rubber 
tubes.  I  substituted  l/2"  electrical  conduit  for  the  greater 
length  of  the  rubber  tube,  using  only  short  lengths  of  rubber 
tube  to  connect  from  the  horns  to  conduit,  and  from  conduit  to 
valve.  With  this  set-up,  the  trouble  was  corrected  for. 

The  results  of  the  test  with  this  apparatus  were,  on  the 
whole,  unsatisfactory,  from  our  point  of  view.  The  source  of 
sound  could  not  be  located  within  45°  either  side  of  the  true 
direction,  that  is,  over  a  range  of  90°.  The  distance  seemed 
to  have  no  effect  upon  this  performance.  The  angle  between  horns 
also  seemed  to  have  a  negligible  bearing  on  the  performance. 


The  sensitiveness  (meaning  by  this,  the  loudness  of  the  soind 
In  the  listening  tubes)  was,  of  course,  much  greater  than  when 
using  the  receivers  as  transmitters  in  the  former  apparatus. 

I  found  it  possible  to  determine  the  direction  as  accurately 
by  setting  the  valve  so  that  the  listening  tubes  were  always  connect¬ 
ed  to  one  horn,  and  then  rotating  the  horn  until  the  maximum  sound 
was  located  . 

The  trouble  with  the  valve  apparatus,  I  think,  lies  in  the  fact 
that  the  intensity  of  sound  varies  very  slowly  with  the  angular 
position  of  the  horns.  It  is  very  difficult  tp  determine  when  the 
intensities  in  the  horns  are  the  same.  Any  number  of  positions  may 
be  found  where  the  intensities  seem  to  be  equal,  to  the  best  of  one'i 
judgement . 

I  had  thought  of  building  an  apparatus,  in  which  a  motor  would 
operate  the  valve  so  as  to  periodically  connect  first  one  horn  and 
then  the  other  to  the  listening  tubes,  and  do  this  rapidly.  I 
approximated  this-,  however,  by  operating  the  valve  rapidly  by  hand. 
The  results  were  bo  better  than  with  the  slow  operation. 


in  my  last  report,  I  suggested  a 
which  microphones  were  to  be  used. 

balanced-diaphragm  apparatus,  in 
I  have  designed  such  an  apparati^ 

and  had  it  built.  The  general  design,  and  arrangement  is  as  shown 

in  the  sketch,  below. 



•SEC.T/0R  -thru 

Balanced  JAAphra  <5H  Apparatus  . 

Usn/ff  M/CROf=HONE<s> . 

Tha  results  of  the  teBts  ,  with  this  apparatus,  are  very  encourag¬ 

The  advantage  of  using  two  microphones  i6,  of  course  that  the  sen¬ 
sitiveness  of  the  apparatus  may  be  increased  by  sc  connecting  the 
microphones,  that  they  are  additive  in  their  action.  So  far  as  I 
could  see,  there  is  no  pure  electrical  connection,  which  will  accom¬ 
plish  this  result.  I  therefore,  arranged  the  apparatus  so  that 
each  miorophone  had  its  own  electrical  circuit,  and  their  actions 
were  added  by  means  of  a  telephone  repeating  coil.  The  connections 
used  are  shown  in  the  connection  diagram  below. 

using  rhcRomoms. 

By  this  dldgram,  it  will  be  seen  that,  nonmally,  the  magnetic  effect 
of  one  microphone  circuit  is  opposed  to  that  of  the  other.  However, 
Vhen  the  diaphragm  moves  in  a  certain  direction,  the  pressure  on  the 
carbon  in  one  microphone  is  Increased,  while  that  on  the  carbon 
of  the  other  microphone  is  decreased.  In  the  first  case,  this 
increased  pressure  causes  an  increase  in  the  current  flowing  in 
that  circuit;  in  the  second  case,  the  decrease  in  the  pressure 
causes  a  desrease  in  the  value  of  the  current  flowing  in  that  circuit. 
Therefore,  the  change  in  magnetic  effect  (Magnetic  flux)  in  the  c«re 
oe  the  repeating  coil  is  the  same  in  either  case,  so  that  the  effects 
are  added. 

The  operation  of  this  apparatus  is  independent  of  the  character  of 
the  microphones,  relative  to  each  other.  It  makes  no  difference, 
whether  the  microphones  are  identical  or  not.  Also,  should  one 
of  the  microphones  become  packed,  the  operation  of  the  device  will 
be  just  as  good,  except,  perhaps  for  a  decrease  in  the  sensitiveness. 

The  principle  of  the  apparatus,  is  the  determination  of  the  posi¬ 
tion  of  the  horns  for  which  there  is  no  movement  of  the  diaphragm. 

The  diaphragm  will  not  move,  or  vibrate  if  at  all  times,  the  pressure 
one  either  sides  is  the  same.  This  condition  is  obtained  when 
the  horns  are  symmetrically  placed  with  respect  to  the  source  of 
sound.  The  function  of  the  microphones  is  simply  to  determine  this 
position  of  no  vibration.  Two  microphones  are  used  so  as  to  in¬ 
crease  the  sensitiveness;  they  are  connected  so  that  they  add  up 
their  effects;  they  are  not  connected  in  op^bitlon.  The  microphones 
have  no  part  in  the  production  of  the  sero  sound  at  the  symmetrical 


In  other  words,  the  balancing  ie  accomplished  by  the  arrangement 
of  the  diaphragm  with  respect  to  the  horns.  The  microphones  serve 
to  detect  any  motion  o£  the  diaphragm.  The  point  of  no  motion  of  the 
diaphragm  is  the  symmetrical  position  of  the  horns. 

Therefore ,, there  is  only  one  balancing  effect  in  this  apparatus 
and  this  is  accomplished  at  the  start,  when  the  sound  waves  from  the 
horns  impinge  on  the  diaphragm.  The  apparatus  is,  then  not  open  to 
the  objection  I  mentioned  in  one  of  my  previous  reports,  that  of  two 
balancing  effects. 

With  this  apparatus,  there  are  two  minimum  points.  First,  when 
the  horns  are  symmetrically  placed,  and  pointing  toward  the  source; 
second,  when  the  horns  are  symmetrically  placed,  and  pointing  away 
<rom  the  source.  There  are  no  other  minimum  points.  The  minimum 
points  of  the  two  classes,  mentioned  above  may  be  readily  distinguish 
The  sound  on  either  side  of  the  symmetrical  position  when  the  horns 
are  pointing  toward  the  source,  is  xatxyxouiBfc  more  intense  than  under 
the  same  conditions,  except  that  the  horns  are  pointing  away  from 
the  source. 

At  the  greater  distances,  for  a  symmetrical  position  of  the  horns, 
a  condition  approaching  absolute  zero  was  obtained.  At  the  smaller 
distances,  only  a  condition  of  a  minimum  could  be  observed.  An  ab¬ 
solute  zero  could  not  be  found  at  the  smaller  distances. 



SENSITIVENESS.  The  sensitiveness  of  this  apparatus  is  very  much 
geater  than  that  of  the  apparatus  using  the  magneto-transmitters.  In 
fact,  the  sensitiveness  is  as  great  as  when  the  horns  were  connected 
directly  to  the  listening  tubes.  . 


I  made  tests  with  the  apparatus,  using  the  Klaxon  at  distances 
of  300,  600,  900,  1200,  and  2970  feet, (the  last  a  little  over  half 
a  mile). 

The  results  of  these  tests  follow. 

(Note.  The  scale  readings  for  all  distances  do  not  correspond,  for 
the  reason  that  the  Ktaxon  was  not  set  up  in  the  same  straight  line 
each  time.) 

All  the  following  determinations  were  made  while  the  light  in  the 
booth  was  extinguished,  so  as  to  be  not  prejudiced  . 

Distance  300  feet 

Determinations  75,  75,  76,  76,  76,  75,  76,  76,  75°. 

Average,  75; 56 

Therefore,  the  determination*  are  all  within  one  degree,  or  one- 
half  degree  either  way  from  the  true  direction.  This  corresponds 
to  a  distance  of  2.62  feet  either  side  of  the  true  position  at 
300  feet. 

Distance  600  feet. 

Determinations  76,  77,  77,  78,  77.  Average  77. 

The  determinations  are,  therefore  within  one  degree,  either  side 
of  the  true  direction,  corresponding  to  a  distance  of  10  feet  either 


side  of  the  true  position. 

Distance  900  feet 

Determinatlons81,  79,  79,  82,  79,  78,  82,  79. 

Average,  80°. 

The  aaximum  deviation  from  the  average  is,  then,  2°,  correspond¬ 
ing  to  a  distance  on  a  900-foot  radius  of  31.4  feet,  either  way  from 
the  tnue  position. 

Distance  1200  feet. 

Determinations  78,  73,  73,  74,  73,  76,  74, 

Average  74.3 

The  maximum  deviation  from  the  average  is  about  4°  corresponding 
to  a  distance  of  83.7  feet  at  1200  feet  radius. 

It  is  to  be  noted,  however,  that  there  is  only  one  reading  so  far 
out;  five  of  the  seven  being  within  one  degree,  or  within  a  distance 
of  21  feet  either  way  from  the  true  position. 

Distance  2970  feet,  a  little  over  halfaa  mile. 

Determinations  148,  149,  151,  147,  151,  151,  15o ,  150,  151, 

Average  150. 

The  maximum  deviation  is  3°  corresponding  to  a  distance  of  155  feet 
on  a  2970-foot  radius. 


During  several  of  my  tests,  while  listening,  I  picked  up  trains 
on  the  Lackawanna  Railroad.  On  several  occasions  of  this  character, 
it  was  possible  for  me  to  observe  a  minimum  point,  that  is,  locate 


and  to  determine  the  dlreotlo  n  of  travel  of  these  trains. 

These  trains  were  generally  picked  up  as  they  started  from  a  stating. 
According  to  the  observed  location,  this  station  was  Madison.  The 
distance  of  these  trains  from  the  booth,  is  2  to  2  l/2  miles.  Of 
course,  I  could  not  check  the  accuracy  of  these  determinations,  as 
I  could  not  see  the  trains,  but  could  only  hear  them. 


I  experimented  with  different  diaphragms  ;  the  diffenences 
being  in  material  and  in  thickness.  The  diaphragms  tried  were  as 
follows.  Iron,  thickness  l/l6",  3/64",  l/32".  Aluminum  l/l6", 

3/64",  l/32",  l/64".  One  diaphragm  cut  from  ferrotype. 

In  general,  the  results  were  better  with  the  aluminum  diaphragms 
than  with  the  iron,  that  is,  when  the  same  thisknesses  are  compared. 

The  best  results  were  obtained,  however,  with  the  diaphragm  made  from 
the  sheet  of  ferrotype 

In  all  the  tests,  the  results  of  v/hich  are  given  abotoe,  the 
Ferrotype  diaphragm  was  used. 

Angle  between  horns. 

The  results  of  tests  on  the  effect  of  the  value  of  the  angle 
between  the  horns  seem  to  show  that  this  angle  has  very  little  to 
do  with  the  performance  of  the  apparatus.  The  best  results,  though 
are  obtained  using  an  angle  not  exceeding  45°. 

In  all  the  above  tests,  the  angle  between  horns  was  45°. 


In  practically  all  of  the  tests  above,  there  was  onaly 


a  slight  wind,  which  was,  for  the  most  part  in  a  favorable  direction, 
in  the  ease  of  the  pbservations  on  the  trains,  however,  the  wind  was 
in  an  unfavorable  direction. 

Other  Sounds . 

Some  trouble  was  experienced  by  the  interference  of  other  sounds. 
At  times,  during  the  tests,  the  wind  blew  briskly,  and  under  these 
conditions,  there  was  a  load  sound  produced  by  the  action  of  the  wind 
on  the  mouths  of  the  horns,  and  it  was  very  difficult  to  pick  up 
the  Klaxon. 

Also,  talking  within  a  distance  of  about  40  feet  of  the  detector 
interferes  with  the  distalnguishing  the  true  source. 

General  Arrangement  of  Apparatus  and  Booth 

Previously,  I  operated  the  horns  by  means  of  a  cord  and  pulley  ifj 
arrangement.  There  was  a  small  amount  of  lost  motion  in  the  cord, 
and  in  all,  the  apparatus  was  somewhat  clumsy. 

I  therefore  had  a  little  tower  built  on  the  booth,  and  now  operate 
the  horns  by  means  of  a  shaft  shown  in  the  sketch,  hferewith.  The 
operation  is  now,  highly  satisfactory. 

in  designing  this  new  set-up,  I  made  provisions  so  that  the  angle 
between  the  horns  may  be  changed,  readily  from  20  to  180°  in  steps 
of  10°  each.  Convenience  in  making  a  change  of  this  angle  is  of 
great  importance  in  investigating  the  effect  of  this  angle  on  the 
performance,  because  the  change  must  be  made  rapidly,  inasmuch  as  one 
is  ppt  to  forget  the  results  of  one  te3t  before  he  has  set  up  for  the 
next,  and  there  is  no  way  of  recording  the  results  except  in  one's 

Respectfully  submitted, 

August  17th,  1917. 

’.7e  have  made  a  number  of  tests  with  the  1200  Ft. 
base-line  making  such  corrections  for  wind  as  we  could  figure, 
but  the  wind  conditions  are  very  variable  at  the  "Range"  which 
is  probably  the  main  cause  of  the  inconsistency  of  some  of  the 
records.  You  will  note  that  the  average  of  7  shots  on  Aug.  14th 
without  the  wind  corrections,  the  average  error  was  5.5$,  where¬ 
as,  when  the  correction  was  made  for  wind  the  average  error  for 
the  7  shot  was  1.73$. 

Due  to  the  heating  of  the  electrical  recorders,  we 
found  that  the  Recorder  points  (which  had  been  stuck  to  the 
Diaphragm^  in  the  same  manner  as  we  use  in  sensitive  musical 
recorders)  became  loose,  and  we  have  spent  most  of  our  time 
since  last  report  in  developing  a  recorder  with  a  better 
mechanical  mounting  for  the  recorder  points,  yet  which  would 
be  equally  as  sensitive  as  those  we  have  been  using. 

We  now  have  a  recorder  which  checks  up  as  even  more 
sensitive  than  what  we  have  been  using  and  yet  we  employ  a 
Diaphragm  .011"  thick  and  a  Stylus  Holder  having  its  outer 
end  screwed  directly  to  the  Recorder  Frame  and  its  inner  end 
attaohed  to  the  Diaphragm.  This  arm  is  oomposod  of  Phosphor 
Bronz  Spring  -  .020"  thick.  It  makes  a  good  mechanical  arrange¬ 

We  are  now  devoting  ou  r  time  to  the  developement  of  a 
satisfactory  single  oontaot  transmitter  which  will  have  an 
equal  or  better  Recorder  characteristic  than  what  we  have  been 
using.  It  will  seem  that  a  single  contact  transmitter  ought 
to  help  us  to  get  more  consistent  results,  as  the  carbon  granules 
changes  in  sensitiveness  from  moment  to  moment. 


il.  H.  Holland. 


1200  Ft.  Base-line. 

Aug.  7th  Distance 

1  4852 

2  4940 

3  4625 

,r.  %  Error. 

■+  1-9 

Average  -  075 

Wind  nearly  calm. 







Aug.  14th.  Distance 

-  90 







3  -  5.8~ 

°/SError . 








Aug.  14th( oontlnued) 








Ft.  Per  Seo. 

Wind  Vel.  Wind  Angle  to  Base. 

7.9  46  Degrees. 

7.9  16  " 

12,2  A 

8.9  56 

15.0  11  " 

15.5  51  " 







e/o  Error. 

-3.5  _ 


Ave  rage 

August  15th. 

Record  Ho. 


Ft.  Error  PerOent  Error. 






4425  -425  -  8.8 

4425  -425  -  8.8 

4720  -130  -  2.7 

4460  -390  -  8.0 

4450  -400  -  8.3 

4770  -  80  -  1.6 

Average  -  6.5 

August  15th  (Continued) 

Record  Ho. 

Ft.  Per  Sec 
'  Wind  Vel- 

Wind  Angle  to  Base. 


Dis.  K>  Error. 



21  Degrees 


-  5.1 





-  4.7 





-  0.4 



26  " 


-  6.0 





-  6.4 



16  "  _ 


-  2.5 



-  3.2 

October  19th,  1917. 

Mr.  Thomas  A.  Edison:- 
Heport  on  Order  #5013. 

Progress  on  this  work  has  been  somewhat  delayed  by 
the  resignations  of  two  (2)  of  our  assistants,  Messrs-  Oook 
and  Hurd  who  returned  to  College,  but  we  have  now  two  men 
to  take  their  places  who  are  pretty  well  "broken  in  on  the 
work.  We  also  met  with  the  misfortune  of  breaking  the  mount¬ 
ing  of  our  cannon,  due  to  the  re-coil  which  deprived  us  of 
its  use  for  several  days. 


Ve  made  a  number  of  tests  from  approximately  the  same 
point  in  which  the  source  of  sound  was  shielded  by  hay  stacks, 
by  buildings,  and  in  one  case,  by  a  hill-  At  a  distance  of  one 
mile  or  over  the  obstructions  did  not  seem  to  materially  effect 
our  results,  as  we  obtained  the  same  average  accuracy  as  when 
tests  were  made  without  obstructions. 

We  have  Just  started  on  our  new  tests  with  a  point 
about  1-1/2  miles  from  the  recording  station  and  are  getting 
some  very  satisfactory  resxilts*  In  a  number  of  cases  the  error 
is  less  than  1$.  We  have,  however,  obtained  some  inconsistent 
readings  and  are  continuing  our  tests  from  this  point  in  order 
to  determine  their  cause. 

Our  first  method  of  making  wind  corrections  was  not 
accurate  under  all  conditions,  but  Mr.  Deans  has  worked  out  a 
very  simple  method  which  can  be  easily  applied  and  which  appears 
to  give  sufficient  accuracy  for  practical  results* 

Some  little  trouble  was  experienced  in  variations  in 
action  of  the  three  (3)  microphones  after  they  had  been  in  use, 
but  we  are  getting  very  much  better  adjustments  ** 
which  the  microphones  do  not  need  to  be  re-adjusted  even  after 
several  days  use  and  exposure  to  the  weather.  Our  tests  now  will 
be  concentrated  on  records  from  the  1-1/2  mile 

are  getting  good  indentations  on  the  cylinder  at  this  distance, 
there  seems  to b  e  no  question  that  they  will  check  up  as  consistent 
and  as  accurate  as  those  made  at  a  shorter  distance  when  we  v 
locate  the  "bugs"  that  have  made  Borne  of  the  readings  away  off. 

October  27th,  1917. 

Mr.  Thomas  A 

Report  on  Order  #5013. 

Attached  is  a  record  of  the  first  lot  of  consecutive  shots  made  with 
the  saluting  cannon  at  about  1-s/lO  miles  from  the  Recording  Station. 

Owing  to  some  difficulties  we  had  with  our  microphones  we  were 
delayed  in  getting  this  record,  but  believe  we  now  have  everything  woiking 
nicely,  and  will  make  records  at  this  point  to  check  up  our  results. 

After  we  are  sure  that  we  can  get  consecutive  reoords  under  varying 
conditions  from  our  present  point,  we  propose  to  move  the  saluting  cannon  to 
the  furthest  possible  point  where  we  can  get  any  record  with  our  present 
microphone  arrangement  and  make  further  tests  from  there. 

Do  you  wish  us  to  make  any  further  tests  Y/ith  the  interfering  noises? 

H.  H.  Holland. 

SHOTS  AT  6989 

1-3/10  miles. 

6757  Ft. 










By  eliminating  two  readings,  shot  #2  and  #8  which  are  obviously 
inconsistent  with  the  other  readings,  and  which  would  probably  be  left 
out  in  practical  wortc  we  have  the  following:  - 


Naval  Consulting  Board  and  Related  Wartime  Research  Papers 
Subjects  ■■  Experiments  (1917) 

This  folder  contains  correspondence  and  financial  reports  relating  to  the 
research  conducted  by  Edison  on  various  projects  for  the  U.S.  Navy  and  U.S. 
Army.  In  addition  to  Edison,  his  secretary  Richard  W.  Kellow,  and  his  personal 
assistant  William  H.  Meadowcroft,  the  correspondents  include  Brigadier 
General  William  Crazier,  Chief  of  Ordnance;  Newton  D.  Baker,  Secretary  of 
War;  William  L.  Saunders,  Chairman  of  the  Naval  Consulting  Board;  and 
Edison's  youngest  son,  Theodore  M.  Edison.  The  documents  pertain  to 
Edison's  agreement  to  work  on  various  military  problems,  including  some 
suggested  by  Crazier,  and  to  be  reimbursed  for  his  material  and  labor  costs. 
Other  items  include  a  critical  report  from  the  Navy  Bureau  of  Ordnance 
concerning  Edison's  plan  for  a  ship-launched  smokescreen  shell,  regular  bills 
submitted  by  Edison  to  the  U.S.  Government,  and  undated  technical 
instructions  to  Ludwig  F.  ("Louis")  Ott  about  chemical  mixtures  for  an 
incendiary  bomb  and  a  stupefying  gas. 

Approximately  40  percent  of  the  documents  have  been  selected, 
including  all  of  the  substantive  correspondence,  a  small  number  of  technical 
notes  directly  relating  to  Edison,  and  about  half  of  the  financial  material. 
Unselected  documents  include  calculations  and  drawings  by  other 
experimenters  (most  of  whom  are  unidentified),  various  printed  tables  and 
specifications,  payment  forms  issued  by  the  Army  and  Navy  in  connection 
with  Edison's  expense  claims,  and  correspondence  about  minor  accounting 
questions  handled  by  Meadowcroft  and  Kellow. 


Memorandum  No. 


Datei’ehruury  2,  1917. 

I  have  heen  informed  by  111*.  A.  E.  Kennedy  today  that 
v,*o rk  on  experimental  recording  iu'tha  new  Recording  Theatre  is  to  he  dis¬ 
continued  commencing*  tomorrow,  and  that  as  per  your  directions  lie  is  to 
devote  his  tine  until  further  notice  to  special  experimental  work . on-S/a «* wwt^rterx. 

'./'e  have  issued  spic-cial  private  shop  order  to  cover 
expense  of  tills  now  experiment. 

Er.  Kennedy  is  under  the  impression  tliat  all  expense 
in  connection  with  this  work  is  to  he  charsed  to  US-G-o*1!-  I  presume 

you  will  nt>t  wish  this  expense  hilled  out  monthly  hut  would  prefer  to  hill 
it  out  at  some  later  date  unless  the  amount  Grows  too  large  and  I  will 
keep  you  advised  monthly  of  the  expenditures  on  the  order. 

It  is  my  understanding  that  you  wish  the  fact  that 
work  is  hcinG  done  in  this  connection  to  remain  secret  and  I  have  made  mem¬ 
orandum  only  in  private  file  which  is  kept  under  look.  I  presume  Hr. 

Constable,  Chief  Engineer,  should',  howover ,  know  of  the  experiment  and 
unless  you  disapprove,  will  inform  him  accordingly. 

Will  you  kindly  indicate  your  approval  of  the  above 
here on  for  my  private  files? 


Form  1533-500-12-16 

Your  Order  No 

Shipping  No. 

A Q  £olO  W 


Orange.  N.  J. 


When  referring  to  thi  bill, 


Sold  to 

United  states  Oovcnsaat, 
finohlaGton,  2.  0. 


JSporiEoatol  vior!i  in  laboratory  on  doviooa  listed  hero¬ 
in  ewer  period  Fob.  1,  1917  to  iiardti  31,  1917  -  AC  COBC  - 





intaarxiie  redbotov 
OboUc  Colqpbmk) 
iubcetriuo  itauol 

lo torrent  UlrclosG 


PbeaOiSAEh  lUnajo  ISndor 

shell  Projector,/ 


Qua  Protection 

ilro  Estla3ulnMnG  Apparatus 

Battle  Slip  Flro  Protection 

Corpcdo  Uatiro  l-owor 

Kxtenoion  Boot 

Bulxonriao  Stydrouon  lotootor 

F.ntrviyinn  Lipjht 

Crouch  Jiatoriol 

Crenoh  Fire 

Viooal  Signalling 

Visual  Bongo  Binder 



























Memorandum  No. 


SUBJECT i  Date  April  27,  1917 


Ur.  Thomas  A.  Edison; 

In  connection  with  the  Edison  Personal  (X)  orders  on 
which  you  are  working,  I  am  afraid  the  proper  distribution  of  charges 
under  the  various  experiments  is  not  being  attended  to,  as  I  have  found 
recently  that  charges  are  being  made  to  the  wrong  numbers.  V/hile 
Ur.  Kennedy  was  on  the  job  I  had  him  covering  this  but  now  that  he  is 
absent  there  is  no  one  to  look  after  the  matter  properly. 

Will  it  not  be  satisfactory  to  you  to  furnish  a  list  of 
all  of  the  orders  to  Ur.  J.  P.  Constable,  Chief  Engineer,  to  be  kept  by 
him  strictly  in  confidence,  and  arrange  to  have  all  new  work  assigned 
by  him  to  the  proper  order  number  or  to  have  a  new  number  issued  to 

I  anticipate  that  you  will  ask  me  from  time  to  time 
for  costs  on  these  orders,  and  I  shall  only  be  able  to  give  you  the 
cost  as  reported  to  me  by  the  various  people  who  are  working  on 
these  orders,  and  if  their  time  and  material  is  not  correctly  dis¬ 
tributed  I  shall,  of  course,  be  giving  you  the  incorrect  figures. 


Ur.  Edison  verbally  repliedto. the  above  to  me  that 
he  did  not  particularly  care  if  charges were£38burately  allocated. 

He  stated  to  allocate  these  charges  f  would  be  simply  to  gratify 

curiosity,  and  he  is  not  anxious  that  this  should  be  done  so  long  a 
total  oharge  is  kept  correctly. 


l.i®8ANS£iiN.  J- 

Your  Order  No 

/(9  bOlOW 

When  referring  t 


Sold  to 

United  st-itoo  Government, 
Washington,  D.  C. 

May  15th,  191V. 

=~HpS^ntal  work  In  l.aborator^  orTaovieoe  , 

listed  heroin  over  period  April  lot,  17  to  .<ay  l  - 
19171——  AT  0032—  1 

laboratory  sooortptlon 

Submarine  Deteotor 
Chalk  Telephone 
Submarine  Funnel 
DeForrest  Wireless 

Phonograph  Range  Finder 
Shell  Trajectory 
Gun  proteotion 

Fire  Extinguishing  Apparatus 
Battle  Ship  Fire  proteotion 
Torpedo  Motive  Power 
Extension  Mast 
Submarine  Hydrogen  Deteotor 
Visual  Signalling 
Visual  Range  Finder 
Aeroplane  Detection 
nitrogen  Fixation 

Freshwater  from  Sea  Water  for  Buoys 
Signal  light  Shutter 
Aeroplane  Bomb  Thrower 
Speed-of-Distant-Ships  Indicator 
periscope  Sighting 
Slow-burning  Powders 

order  I 









51 VI 


ORANGE,  N.  J. 

When  referrina  ' 

Sold  to  United  States  Government, 
Washington,  D.  C. 

June  3oth,  191V. 

=  ..  ir,mnntn1  wnrTr  Ar\  Wh  nr  at  or. 7  on  devices 

me  t.  a™, 

30th,  191V - AT  COST - 

5005  Submarine  Deteotor 

5010  Submarine  Funnel 

5011  DeForrest  Wirelese 

6012  photography 

5013  Phonograph  Range  Finder 

5016  Visibility 

603V  Shell  Trajectory 

5044  Miorophone 

5049  Battle  Ship  Fire  protection 

5068  Torpedo  Motive  power  ^ 

5082  Extension  Mast 

6090  Submarine  Hydrogen, 

'  5092  Submarine  light 

6094  Trenoh  Ub±W%9-\^'~ 

510V  TrenohFi 

5147  VlstwlySenge  Finder 

51 VI  nitrogen  Fixation 

5234  Signal  light  Shutter 

5246  Aeroplane  Bomb  Thrower 

5273  perlsoope  Sighting 

ms  isrsss ra— 

3  96 



39  V  166 
366  21 
218  26 
104  |22 

OBLiKi-.V^xIOli  Oii  BOARD  SHIP . 

I  discussed  this  subjoct  with  Adrnirul  Burd  and 
Ur.  Fulton  at  the  Brooklyn  Havy  Yard  this  morning. 

Tho  uso  of  Port  Holes  for  this  purpose  has  sorious 
disadvantages ,  as  follows: 

1.  On  merchants  ships .  the  loading,  and  hone c  the  water  ^ 

line,  is  a  very  variable  quantity,  water  line  "  : 1 

20  foot  duo  to  loading  conditions.  Honco  the  number,  or  port 
holes  required  would  be  too  largo  for  practical  purposes,  and 
thoy  would  weaken  the  hull. 

p  She  rlase  must  bo  easily  and  quickly  replaceable,  because 
thecae ti on  S  the  water  soon  ios  clear  gl^s  like  ground  glass. 
This  would  not  ho  a  simple  matter  in  tne  cusc  of  port  holes. 

3.  Bvon  with  constant  loading,  a  sories  of  port  holes ,  ono 
over  the  otho  .  at  each  point  of  observation  *°g"?M’’or 

On  armored  vossels  this  would  not  bo  practicable  and  on,  ox 
it  would  w oaken  the  hull  too  much. 

On  the  other  hand,  the  ubo  of  an  ad  .jus  table ,  inverted, 
periscope  on  the  Bide  of  tho  vessel  soeraed  to  Admiral  3urd  and 

to  tlr!"~felton  to  be  entirely  feasible  and  praoticablg.. . In 

discussion  it  developed  tha't  tho  disadvantage  oi  TEIl  method  axe 
not  serious,  and  can  easily  bo  surmounted,  as  follows . 

1  Rolling  of  all  ocean  going  vossels  is  comparatively  slow, 
and  canbe  taken  care  of  by  making  inverted  periscope  with  wide 
angle  of  vision  in  vertical  piano. 

p  Vibration  on  war  vessels  is  not  serious,  and  when  it  may 
be^soriousi  a  floxiblo  mounting  can  be  proviaod  to  tako  care  of  it. 

3.  Kith  suitable  reflecting  surfaces,  the  loss J^J^etors 
negligible,,  particularly  when  apparatus  is  noV!5  *?fl60t0 
can  be  frequently  rcplacod,  and  tho  old  one  repolishea . 

It  is  recommended  that  efforts  ho  concentrated  on  tho 
inverted  periscope  principle. 



iir.  iidison: 

Perhaps  it  would  ho  advisable  to  submit  to  TiUshirigton 
at  this  time,  a  report  on  tlio  results  thus  fur  obtained  with  tho 
Silhouette  mothod  of  spotting  perisconoe,  and  to  augpoct  t)iat  a 
dostroyer  bo  equipped  with  devices  for  this  purpose  and  tried  ou 
under  actual  wur  conditions.  It  would  tu'.-o  only  a  comparativel 
short  time  to  so  equip  a  destroyer . 




United  States  Govommont, 
Washington,  D.  C. 

JUly  31at,  1917. 




















Sutrarine  Detector 
fwratv-  jaiophone 
Sutaarlne  Fumol 
DePorroat  V/ireloaa 

31  50 
3  50 
27  79 

61  18 
53  13 
297  66- 

.eonBoope  aignwom  „ _ , 

aian-buming  Pondera 
Ship  Pro toot Ion  against  Torpedoea 
Aeroplane  Oonatruotlon 
Invisibility  of  Freighters 

I  oartify  that  the  above  till  la  true  and  oorroot 

\  \ 

"ashington,  h.C. 
August  20,  1917. 

Brig.Ccn.''illiara  Crosier,  Chief  of  Ordnanco,  U.P.A., 
'ashington,  3.C. 

Pear  2ir : 

X  have  ho on  conducting  many  experiments  on  new 
devices  for  tho  Ilavy  Department ,  which  havo  resulted  in 
dovicos  that  appear  to  he  of  considerable  valuo  to  the  Uavy. 

In  ray  researches  7.  havo  cono  across  nan;/  things 
that  would  ho  of  valuo  to  tho  Array,  hut  I  have  not  authority 
to  expend  any  none;/  for  ouch  work  on  account  of  tho  Array. 

”r.  Daniels,  from  some  fund  which  he  has  available , 
has  authorised  rae  to  go  ahead  and  expond  any  reasonable 
amount  of  money  per  month,  for  labor  and  Material  in  ranking 
and  trying  out  dovicos.  he  lias  recently  supplied  me  with  a 
200  ft.  convortod  yacht.  In  orfior  that  I  may  nako  practical 
tests  impossible  to  make  on  land. 

If  you  will  authorise  mo  to  go  ahead  and  employ 
mon,  purchase  material  etc.,  within  roaEon,  I  will  prooood 
to  conduct  experiments  and  work  out  dovicos  for  tho  Array, 
hooping  in  closo  touch  with  you,  and  roporting  promptly 
ovory  few  dayB  on  tho  result  of  tho  experiments  in  liand. 

At  prosont,  in  navy  work,  T  expend  my  own  money 
and  at  tho  ond  of  tho  month  Bond  in  a  hill  with  vouchors 
attached,  fhis  hill  of  labor  and  material  is  put ugh 
iny  hooks  absolutely  without  profit,  ffhoro  aro  no  patent 
ro  altios  to  ho  paid  mo,  nor  will  I  acoopt  any  remuneration 
for  ray  personal  sorviooe. 

If  yon  wish  to  mako  such  an  arrangement  in  order 
that  I  may  prooood  with  Army  work,  it  will  he  my  pleasure 
to  do  so  at  onco. 

Hospoctfully  yourB, 

* ugust  s 


Hon.  llevs ton  D.  Baker, 
Secretary  of  War, 

Washington,  D.  C. 

My  dear  Llr.  Baker: 

Your  favor  of  the  22d  instant  was 
forwarded  to  me  on  the  U.  S.  S.  Sachem,  where  X  am 
working  just  now. 

Do  not  fear  that  I  will  spend  money  foolishly 
or  cause  you  embarrassment  in  any  way.  The  men  I  use 
receive  only  ordinary  workmen's  salaries. 

Expenses  for  materials  purchased  and  work  done 
for  the  Havy  so  far  averages  about  fifteen  thousand 
dollars  a  month.  Work  done  for  your  Department  should 
be  considerably  less. 

I  pay  all  costs  myself  and  then  bill  them  to 
the  Departments,  lio  profit  of  any  kind  is  included. 

In  cases  where  an  experiment  may  cost  more  than  •ii’c.uuu 
X  would  get  your  special  permission. 

Yours  sincerely, 

(signed)  Ehos.  A.  Edison. 




flcn  ,  'frao-fc,  *0.  ^4*, 

,  -XcacclVvt*,  t*-/—  &‘M 

r<n  ,  ' 


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•sviJwfsAasafegi^fe^^  Vt-\.a  'UUs^w  Y  i_-‘--a_.c_ 
iVUtU'Pi.  '  (yvr,Cw^v sJ 

V.A>-e--vV.v.w<^wli  .4  •£^^tlv^«uS>* 

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(•V..><  :  t  <-  •>  f  s^- ffl< .  jv-Cf 

VO  C"v(v  A<i~v\  fi. .  k'<^  (3'£-N^ 

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fer  \4e 

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l,.cX>  •V^r-C.v--!'  ©  I 


ISatml  CasrsinaiNG  Boak© 


11  Broadway  New  York 

Dear  Mr.Edison:- 


Enclosed  herewith  please  find  a  copy  of  the 
Bureau  of  Ordnance  Navy  Department  Report  to  the  Chief  of  Naval 
Operations,  dated  August  H9»  together  with  a  copy  of  my  letter 
to  Mr .Hurley  on  the  subject. 

Very  truly  yours, 

2  enos. 

})f  Pciuioit : 


-U.  SlCHA-C. 


A  CC<  L 



/rt.t  fccf.Cs'i* 

'^Cci^C-  j\  Cl. Mo.  n/fic.?  r. 



Edward  H. Hurley, E-i.., 

Chairman,  Unit 2a  Statoo  Shipping 
Emergency  Float  Corporation, 

131S  F  St.,K.K., 



Dear  iSr .  Chain-van:  - 

I  snail  endeavor  to  be  {recent  on  Thursday  morning 
next  at  12:30,  In  accordance  oitb  tao  auggei; lion  contained  in  your 
letter  oi  the  ;Hat  nit. 

I  fear  th.-.t  Hr .Edison  till  net  oc  aolo  to  be 
prscsnt  aa  he  is  out  on  a  ship  trying  experiment#. 

1  have  sent  to  Ht  .Edison  a  espy  oi  the  Bureau  of 
Ordnance  Report  tc  the  Chief  o  1.  K-val  Orora-ti  .us,  l- ted  August  i>. 
Hn  is  tnn  proper  person  to  Answer  it,  but  there  are  certain  points 
union  I  should  llfce  to  sail  Attentions 


Since  thin  report  was.  written  Hr .Edison 
triad  the  emofco  producing  mixture  over  tha  water.  T>‘S  re; 
have  states  that  the  fog  la  very  much  more  extensive  over 
ever  the  land . 

r  art 

hich  I 
cater  than 

The  chief  point  in  thin  Bures 
on  tha  oasis  of  which  this  suggestion  is  turned 
in  tha  report,  namely,  "the  primary  objection  oi 
is  considered  insurmountable  for  this  material.1. 

of  Ordnance  Report 
town,  is,  --a  stated 
abaorpti.n  by  ..-tor 

Aoocrdin  to  the  report,  a  contact  shell  "hloh 
is  recommended  for  this  device  will  explode  in  the  time  estimated  at 
.01  ^  .1  second.  It  ie  not  proposed  to  fire  this  shell  fro.. a  mortar, 
but  from  a  regular  gun.  Such  a  shell  we  are  taught  « ill  not 
penetrate  the  water  except  In  rare  instance#;  tnat  it  will  rconsroncr. 

To  a  lay  mind  it  seen*  improbable,-  in  fact  imposeiole,  tnat  In  a  time 
from  one-  un froth  to  one-tenth  of  a  second  there  could  be  any  sc-loua 
effect  of  tha  water  upon  the  gases  or  spray  resulting  fro,  tne  explosion. 
Even  though  the  obeli  might  be  slightly  under  the  water  tno  explosion 
would  bs  so  sudden  a#  to  discharge  all  the  vapor  into  -.he  air  as  a „>inox 
the  water,  which  offers  greater  resistance. 

I  can  suite  understand  that  u  snail  containing 
material  with  an  affinity 'for  water  when  exploded  10  or  20  feet  under  wat 


Edvt.N. Hurley,  Esq., -2. 

might  lose  most  of  Its  gas  or  vapor  before  reaching  the  surface, 
but  this  explosion  scorns  likely  to  take  place  at,  near  or  on  the 
surfaoe  of  the  wator. 

The  thing  that  Impresses  me  most  about  this  report 
is  that  Its  orltlolsm  is  destructive  and  not  constructive.  The 
only  ooii6truotlve  feature  about  it  Is  the  statement  made  in 
paragraph  2.  -  namely,  "The  Bureau  has  for  some  years  been 
experimenting  in  the  endeavor  to  obtain  a  satisfactory  smoke 
produolng  shell."  This  is  followed  by  the  statement  in  the 
last  paragraph,  "The  Department  is  advised  that  the  Bureau  is 
continuing  its  experiments  in  the  development,  of  a  smoke  shell. ■ 

In  the  faoe  of  this  submarine  menace  muet  we  go  on 
for  "some  years*  longer  with  Department  experiments?  Why  not  try 
out  Mr  .Edison's  suggestion  in  one  or  two  shells?  Let  them  be  r,and 
made,  let  them  be  fired  only  a  moderate  distance,  but  let  it  be 
determined  by  actual  experiment  whether  or  not  this  material  will 
be  absorbed  by  the  water  when  exploded  by  contact.  Perhapa  there 
Bill  be  more  absorption  than  «e  think,  but  let  us  spend  less  time 
in  theorotloul  crltioism  and  more  in  praotloal  trials  where  simple 
proposition^  like  thle  are  in  dispute. 

Very  truly  yours. 

W.L. Saunders  (signed), 




BUREAU  OF  ORDNANCE  August  29th  1917  • 


To:  The  Chief  of  Naval  Operations. 

Subject:  Smoke  produoing  shell  -  Edison  design. 

1.  Mr .Edison  has  proposed  the  use  in  antisubmarine 
warfare  of  a  shell  filled  with  a  mixture  produoing  smoke.  These 
shell  to  be  used  essentially  as  defensive  shell,  to  be  thrown 
between  a  vessel  and  a  submarine  for  the  purpose  of  creating  a 
smoke  fog  or  soreen,  preventing  the  observation  by  the  submarine 
of  the  vessel's  movements  and  conclusively  preventing  accurate 
gunfire  from  the  submarine  against  the  vessel. 

2.  The  principle  is  undoubtedly  valuable,  and  the  Bureau 
has  for  some  years  been  experimenting  in  the  endeavor  to  obtain 

a  satisfactory  smoke  producing  shell. 

3.  Mr .Edison  has  performed  oertain  experiments  which  lead 
him  to  believe  he  has  obtained  a  satisfactory  shell  for  the  purpose * 
This  shell  is  loaded  with  sulphuric  acid  in  whion  is  absorbed  a 
oertain  proportion  of  sulphuric  anhydride.  It  is  understood  that 
his  shell  has  been  brought  to  the  attention  of  the  President  of 

the  United  States,  the  Secretary  of  the  Navy  and  the  British 

If.  Eefore  commenting  on  Mr. Edison's  shell,  it  may  be 
advisable  to  show  the  conditions  which  must  be  fulfilled  by  any 
smoke  producing  shell  for  use  in  naval  warfare. 

(a)  The  shell  must  be  loaded  with  materials  which  are  safe 
during  storage  aboard  ship  and  which  can  withstand  the  shook  of 





(b)  The  shell  filler  must  of  itself  be  sufficiently  explo¬ 
sive  to  burst  the  shell  when  ignited  by  a  fuse,  or  it  must  be 
practicable  to  introduce  a  separate  bursting  charge  into  the 

(c)  The  smoke  producing  material  must  be  such  that  it 
will  not  be  readily  absorbed  by  water. 

5. Requirements  (a)  and  (b)  are  selfevident.  Requirement 
(c ), however,  needs  some  explanation.  Obviously,  for  the 
purpose  of  laying  a  smoke  screen  between  a  vessel  and  the 
target  of  its  guns,  impact  with  the  target  ship  can  not  be 
counted  upon  as  a  means  of  explosion  of  the  shell.  Consequently, 
the  shell  must  be  exploded  in  one  of  two  ways;  (1)  in  air,  by 
the  action  of  a  time  fuse;  (2)  or  on  impact  with  water,  at 
some  point  short  of  the  target. 

(1)  The  ideal  conditions  of  the  use  of  smoke  shell  would 
permit  bursting  shell  in  air  dose  to  the  surface  of  the  water, 
suoh  burst  spreading  the  smoke  immediately  above  the  surface 
of  the  water.  Such  ideal  conditions,  however,  oan  not  be  found. 
For  suoh  aotion  it  would  be  necessary  to  know  precisely  the 
range  and  the  time  of  flight  to  be  expeoted  under  the  prevailing 
atmospherio  conditions.  In  addition,  absolutely  accurate  time 
fuse  aotion  would  be  necessary.  With  the  present  types  of  time 
fuses  this  last  is  impracticable,  as  the  best  that  can  be 
counted  upon  is  a  variation  of  .4-  seconds  or  200  yards  in 
range,  or  at  an  angle  of  fall  of  15  degrees  150  feet  in 
height.  Consequently  failing  the  impossible  ideal  conditions 
the  result  of  the  attempt  to  use  smoke  shell  exploded  in  air 




by  a  time  fuse  would  be  a  series  of  smoke  clouds  distributed 
along  tbe  arohing  trajectory  of  the  shell,  and  effective 
at  the  surface  of  the  water  only  in  case  of  a  very  luoky, 
rather  than  very  accurate,  shot. 

(2)  Impact  -with  water,  however,  furnishes  a  ready  and 
accurate  means  of  exploding  the  shell  in  direct  line  between 
the  ship  ana  the  target  vessel.  Impact  fuses  will  readily 
explode  shell  on  contaot  with  water.  The  curve  of  the 
trajectory  interposes  no  objectionable  features,  since  the 
shell  is  not  exploded  until  it  reaches  the  surface  of  the 
water,  in  the  plane  of  vision  between  submarine  and  vessel. 

Thus,  automatically,  the  difficulties  of  range  and  timing  are 
obviated  and  all  that  becomes  necessary  is  to  land  the  shell 
in  line  with  the  target,  on  the  “near"  side  thereof,  a  very 
simple  ballistic  performance  in  comparison  with  the  complicated 
and  accurate  firing  required  for  the  shell  exploded  in 
air.  On  impact  with  water,  a  sensitive  fuse  will  explode  the 
shell  in  a  time  estimated  as  not  greater  than  .01  to  .1  second. 
During  this  time,  however,  the  shell  has  penetrated  beneath  the 
surfaoe  of  the  water  to  a  oertain  distanoe,  and  on  its  explosion 
its  contents  must  tp  some  extent  pass  through  the  water  before 
again  reaching  the  atmosphere. 

From  the  above,  the  necessity  of  requirement 
(o),  that  the  shell  filler  should  be  of  material  not  absorbed 
by  water,  is  apparent.  The  only  practicable  smoke  shell  is 
one  whioh  oan  be  fired  to  explode  on  impact  with  water. 

On  such  impact  it  is  below  the  surfaoe  of  the  water  at  the 


moment  of  explosion  and  the  producte  of  its  explosion, 
in  order  to  reach  the  atmosphere  and  form  smoke  clouds, 
must  be  such  ae  not  to  be  absorbed  by  water. 

7.  Returning  to  the  consideration  of  Mr . Edison* s  shell. 

He  proposes  a  shell  loaded  with  oonoentrated  sulphuric  aoia 
saturated  with  sulphuric  anhydride.  Photographs  attached  to 
his  correspondence  display  considerable  smoke  effect  over_lanaU_ 
As  noted  above,  however,  smoke  producing  materials  non¬ 
absorbable  in  water  are  necessary.  Sulphuric  aoid  and  sulpnurio 
anyhdride  have  a  very  strong  affinity  for  water.  It  is  not 
believed  possible  that  shells  with  this  material  exploded  on 
contact  with  water  will  produce  a  satisfactory  smoke  screen. 

For  the  reasons  noted  above  it  is  deemed  impracticable  to 
use  time  exploded  shell  to  produce  a  smoke  screen.  Consequently, 
the  shell  filler  proposed  by  Mr .Edison  is  deemed  unsatis¬ 
factory  for  nsval  use. 

2.  In  addition  to  these  objections  it  would  appear 
that  the  use  of  sulphuric  aoid,  highly  oonoentrated,  would  be 
dangerous  in  a  shell  containing,  necessarily,  other  explosives 
to  burst  the  shell.  This  difficulty,  however,  might  be 
obviated,  but  the  primary  objeotion  of  absorption  by  water 
is  considered  insurmountable  for  this  material. 

9.  The  type  of  shell  body  proposed  by  Mr .Edison  in 
hie  letter  of  August  15th  appears  generally  satisfactory.  It 
differs  so  little, however,  exoept  in  length,  from  the 
standard  shrapnel  shell,  that  the  Bureau  considers  that  for 
experimental  purposes  the  shrapnel  shell  would  prove  adequate. 




10.  The  Bureau  does  not  doubt  the  evidenoe  of  Hr. 
Edison's  photographs  that  a  very  satisfactory  smoke  fog 

oan  be  obtained  over  land  with  the  proposed  chemical,  but  it  iB 
oonvinoed  that  the  ohemical  in  question  is  impracticable  for 
use  as  a  shell  filler  for  smoke  producing  shell  to  be  fired 
over  water . 

11.  The  Bureau  does  not  recommend  experimental  firing 
of  this  oleum  shell,  believing  that  the  shell  is  dangerous  in 
loading  and  is  essentially  valueless  in  performance  for  naval 

12.  The  Department  is  advised  that  the  Bureau  is 
continuing  its  experiments  in  the  development  of  a  smoke 
shell  satiafaotory  to  meet  the  conditions  prescribed  above  as 


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All  communications  should  he  addressed  to  "The  Chief  of  Ordnance,  U.  S.  Army,  Washington,  D.  C." 

have  been  made  you  to  do  certain  experimental  work  for 
the  Army,  I  bring  to  your  attention  the  fact  that  v/e  are 
now  very  much  interested  in  the  question  of  tracer  bullets, 
incendiary  ballets,  armor  piercing  bullets  and  the  general 
question  of  improvements  in  cartridge  primers. 

The  results  of  investigations  and  experiments 
along  these  lines  would. be'  appreciated. 


ORANGE.  N.  J. 

United  States  Government, 
Washington,  X>.  C. 

. f:  20 . 


September  29th,  1917. 

Experimental  work  in  laboratory  on  devices  listed 
herein  over  period  Angnst  1,1917  to  September  29,1' 

at  cost.  _ _ _ 


Order  No.  Description 

5006  Submarine  Detector 
6009  Chalk  Telephone 
6011  DeForrest  Wireless 

6013  Phonograph  Range  Finder 

6014  Telesoope 
6016  Visibility 

6037  Shell  Trajeotory 
6044  Microphone 

6047  Fire-extinguishing  Apparatus 

6082  Extension  Mast 

6090  Submarine  Hydrogen  Detector 

6147  Visual  Range  Finder 

6171  Nitrogen  Fixation 

6181  Muzzle 

6211  Fresh  Water  from  Sea  Water  for  Buoys 

6234  Signal  Bight  Shutter 

6246  Aeroplane  Bomb  Thrower 

6261  Speed  of  Distant  Ships  Indicator 

6273  Periscope  Sighting 

6291  Slow-burning  Powders 

6460  Aeroplane  Construction 

6462  Invisibility  of  Freighters 

6464  Telehood 

6636  Destruction  of  Wire  Entanglements 
6636  UAder-water  Explosions 
6676  Color  Interference  on  Painted  Ships 
6683  Anthraoite  Coal  Test 
Smoke  Shells 

I  oertify  that  the  above  bill  is  true  and  correct. 












463.92  - 




October  4,  1917. 

Brig.  General  iiilliara  Crozier, 

i'ho  Chief  of  Ordnance,  U.  0.  Army,  ; 

i.ashington,  D.  C . 

Dear  Oir:- 

Your  favor  of  the  22d  ultimo  to  Ur.  liaison, 

(li  471.836.73)  was  resolved  and  sent  down  the  Coast  to 
him,  whero  he  is  working  on  some  experiments  for  the  1 
ltavy  Department. 

I  Kavo  rocoived  a  memorandum  from  him  asking 
me  to  acknowledge  the  receipt  of  your  letter  and  to  say 
to  you  that  just  us  coon  as  he  gets  through  with  tho  o:.- 
poriraonts  ho  is  now  r.ukinr  at  coa,  he  will  start  work 
oh  tho  itoMc  montionod  in  your  letter. 

Yours  very  truly. 

Asuistant  to  liy.  Edison. 

A/401 D. 


United  StateB  Government, 
Washington,  D.  C. 

October  SI,  1917. 

Experimental  work  in  laboratory  on  devices  listed  herein  over 
period  Oototier  1st, 1917  to  October  31at,1917  at  coBt. 

Order  Wo.  Description 

6005  Submarine  Detector 

SOU.  DeForrest  Wireless 

5013  Phonograph  Hange  Finder 
6016  Visibility 
5037  Shell  Trajectory 

5090  Submarine  Hydrogen  Detector 

5147  Visual  Bangs  Finder 

6234  Signal  light  Shutter 

6245  Aeroplane  Bomb  Thrower 

5273  Periscope  Sitting 

5292  Ship  Protection  against  Torpedoes 

5450  Aeroplane  Construction 

5452  Invisibility  of  Freighters 

5454  Telehood  (lire  shield-observing  on  water) 

5635  Destruction  of  Wire  Entanglements 

5536  Underwater  Explosions 

5575  Color  Interference  on  Painted  Ships 

5583  Anthracite  Coal  Test 

5632  Smoke  Shells 

5171  Hi^rrogen  Fixation 











1274.96  ' 

I  certify  that  the  above  bill  1b 

and  correct. 

Washington,  D.  C. ,  Nov.,  3,  1917. 

My  dear  Theodore 


Your  father  wishes  me  to  say  that  he  hajs/allowed  a  fund  for 
experiments  hy  the  War  Department. 

Therefore,  youmay  huy  any  motor  you  want  for  the  wheel  and  you  may 
also  get  anything  made  that  you  think  necessary  or  take  on  a  few  men  if  you 
find  it  desirable.  Your  father  wisheB  me  to  say  also  that  he  would  like  you 
to  hasten  the  work  as  rapidly  as  possible. 

See  Mr.  Kellow  about  any  expenses  and  tell  him  to  keep  them  separately 
as  agqinst  the  War  Department. 

Yours  staoerely, 

Y/illiam  H.  Meadowcroft. 

Office  of  Secretary 


Personal  (X)  orders  -  ...  V 

Meadowcroft,  J  '  'r  rst\  tVi- 

ineral  Board  Room,  v  ^ 

k  *  -f—OTvy  Annex,  ’  T)0't‘ &  .0, 

yuA  \ 

\y  ^  1  Dear  Mr.  Meadowcroft:  ^ 

■(  Mr.  Theodore  Edl 

Kj  \cp  V 

\  j  p  «  ^greased  to  him  regarding  certs 
^  |  v^y  glad  to  cooperate  with  him 

Lt>'  Memorandum.TTo , 
P«-'t  Date’  Nov.  7tht 

'  vK 

'^F^5onneotion  and  1 801  in 

Mr.  Theodore  Edison  has  shown  me  your  manuscript  letter 
■eased  to  him  regarding  certain  work  he  iB  doing  and  I  Shoutd^be 
the  utmost  in  this  work. 

You  make  reference  to  the  allowance  of  a  fund  in  this 
some  appropriation 
'•^has  Been  made  against  which  we  shall  have  to  work,  or  are  we  to  be 
allowed  to  proceed  the  same  as  in  the  work  whioh  has  been  done  up  to 
date.  That  is,  render  our  bills  for  whatever  work  has  been  done 
.thout  reference  to  any  appropriation. 

Have  you  any  information  as  to  the  rendering  of  our 
bills?  V/e  have  rendered  them  heretofore  simply  against  the  United 
States  Government.  Mr.  Theodore  Edison  tells  ms  that  the  work  he 
^ — is-doing  is  to  be  charged  against  the  Amy  rather  than  against  the 

Thanking  you  for  Emy  advice  you  can  give  me,  I 

Copies  to:- 


shington,  D.  C.” 

replying  refer  to  No, 



Hovomber  IE  1917 

\  ^0 
\  s 

I  ;<• 

Hr.  Bhonao  A.  .Edison, 
iftsahington  j).  C. 

Usr  dear  -ir.  Edison: 

Koforring  to  your  lottor  of  August  20,  1917 
O.t.  Ei35.4l/lE ) ,  and  to 'the  fact  that  certain  allot- 
monts  have  boon  raado  you  to  do  certain  experimental 
v/orl:  for  the  Army ,  and  to  a  lottor  from  this  Oii'ioc 
datod  September  22,  1917  (K  471.036/75) ,  suggesting 
subjects  of  investigation  in  whioh  this  Department 
would  bo  intorostod,  may  I  auggoct  tho  following 
additional  subject b: 

1.  lloro  simple  synchronising  devices  to  cnablo 
a  machine  gun  to  fire  through  the  blades  of  t3io  pro¬ 
peller  of  an  aeroplane  without  interf oronco . 

2.  She  development  of  material  to  take  tho  placo 
of  flan  or  cotton  in  msohino  gun  ammunition  bolts,  which 
is  not  subject  to  ohango  as  regards  its  pjjysioal  propor¬ 
tion  vrnon  cubjoctod  to  varying  weather  conditions. 

3.  Sho  dovolopraont  of  more  suitable  luminous 
dovioos  whereby  a  machine  gun  may  bo  accurately  aimod  or 
laid  at  night. 

4.  A  range-finding  instrument  or  combination  of 
instruments  which  will  give  oontinuously  notual  and  pro- 
dieted  ranges  or  airorai't  and  lateral  and  vortical  sight 

5.  Invostigato  tho  cubjoot  of  rubber  and  composition 
packing  for  uso  in  connection  with  hydro-pnoumatio  recoil 

i  addressed  to  "The  Chief  of  l 


2nd  Sheet 

6«  The  practicability  of  utilizing  various  means 
for  effeoting  a  detonation  of  high  explosive  BhellB  before 
they  have  made  contact  with  the  earth,  such  ae,  possibly: 

(a)  The  frictional  eleotricity  which  is  engendered 
by  the  passing  of  the  shell  through  the  air, 

(b)  The  law  of  attraction  of  bodies  in  the  Bame 
connection  might  be  worthy  of  consideration  with 
a  view  to  experiment. 

(o)  The  relative  rate  of  oonduotivity  of  heat 
from  the  shell,  whioh  may  be  affeoted  by  its 
approach  to  the  earth, 

(d)  The  possibility  of  utilizing  magnetic 
phenomena  of  a  delioate  nature  actuated  by 
attraction  of  raagnetio  material  in  the  earth 
upon  magnetio  element  in  the  shell. 

Note:  All  of  the  above  suggestions  are  made  with  a  view 
to  securing  detonation  ;;a.t„a  given  distance  above  the  earth,  and 
are  independent  of  the  "time  element  whioh  enters  into  time  fuse 
principles.  If  explosion  oan  be  secured  at  even  a  slight  dis¬ 
tance  above  the  earth,  say  two  or  three  feet,  it  will  be  more 
satisfactory  than  the  present  projecting  detonator.  It  1b 
realized  that  many  practical  difficulties  present  themselves, 
but  if  these  can  be  overcome,  the  value  of  this  method  of  ob¬ 
taining  bursts  before  Bhells  have  penetrated  will  be  of  material 

9«  Some  rapid  method  of  obtaining  the  range,  angle  of 
departure  and  fuse  setting  for  anti-airoraft  guns  iB  muoh  needed. 

8.  A  method  of  eliminating  eroBion  in  high  power  guns 
would  be  of  extreme  value. 

19.  Next  to  an  improvement  in  the  quality  of  steels 
would  be  a  rapid  method  of  detecting  flaws,  pipeB,  seams 
and  oracles,  whioh  may  be  invisible  from  the  exterior. 

IQ.  The  use  of  flame  projectors  haB  practically  been 
abandoned  owing  to  the  nature  of  results  obtained.  Develop¬ 
ments  along  these  lines  will  have  considerable  value.  The 

nmu nictations  should  be  addressed  to 



3rd  Sheet 

original  projectors  threw  a  solid  stream,  hut  the  quiok 
exhaustion  of  the  supply  of  liquid  made  it  necessary  to  econ¬ 
omize  hy  projeoting  liquid  slugs.  The  maximum  range  obtained 
with  300  pounds  per  square  inoh  pressure  is  about  60*.  If 
it  wore  possible  to  increase  the  range  beyond  200',  the  value 
of  the  weapon  would  be  materially  enhanced.  Liquids  for  use 
have  been  devised  by  the  Research  Laboratory  at  the  American 
University,  and  it  now  remains  to  develop  an  apparatus  whioh 
will  project  the  liquid  and  at  the  same  time  ignite  it.  The 
portable  feature  muBt  not  be  lost  sight  of. 



Uaj.aen. ,  Chief  of  Ordnanoe 


Orange,  n.  j. 

United  States  Government, 

Navy  Bepartment, 

Washington,  D.  C. 


v'* _  Booemhor  5th,  1917, 


Experimental  work  in  laboratory  on  devioee  listed 
herein  over  period  November  1st  ,1917  to  Boooraber 

5th, 191 7  at  ooat» _ 


Order  Bo . _  Bosorlptlon 

5355“  Submarine  Beteotor 
/„12  Phonograph  Range  Pindor 
^6037  shell  Trajectory 
v6044  Miorophone 
6090  Submarine  Hydrogen  Detector 
Visual  Signalling 
"J"®  Aeroplane  Beteetion 
kSak  Nitrogen  fixation 
v  Aeroplane  Bomb  Thrower 

Invisibility  of  freighters 
✓6676  color  Intareferenoe  bn  Painted  Ships 
5683  Anthracite  Coal  Teat 
EG®2  Smoke  Shells 

6699  Submarine  Strategy  Experiments 
6766  finely-divided  form  of  Trinitrotoluol 
6636  Destruction  of  Wire  Entanglements 

(“Transferred  to  Army  Pooartment) 

I  oertify  that  the  above  bill  is  true  and  correct. 

Coji  y  JldCe.rn.beY-  Zo/tc.  /f/7. 

'Report'  ujLtn  UlafoY'  Cem.fbe.UiS  cLescri/>t7,on 
of  nt-r.  cdtJon’s  ^nvenTi  an. 

/-  Tfu.  t'nventt'on  Consists  in  emetKocL  of  hrvfolsUnj-or 
C  dY'  Con-taCn.Cn. q  exfilos ire. 

.  Tl  .  .  .  ,,  ,  ^  Uy.wke.cL,  ^r-en^L 

Z„  /A..*.  c.*.r~cas-e.  j>raja oscfL  Ts  m  ffCi.J*Y^yn'  J  / 

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7%  e  rtxetkocL  of  frofuLsion.  consists  in  stBrtn$  -ene^qy  Cn  ATa 
t-avcajj  /'tt'o/uin.y  ‘•'A  «$VcA.  sfi*.*.eCs  &s  £r>*.J> t.Qil«.~tL~rtaUy 
’ttte.iscnq  Tree.  M/A  eet  from  its  -fir-utiConj, 

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r>L-TnotLs  ia/CIL/  ib~mvst~ it.  agmidtLj  insult  in  j~<avoy  oj-  'e.xCsbCn  g 
nicHcooLs  for-  ttcc  following  rcdsons  r  — 

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Carcase-  WcCgkts  wilt  id.  -Cxces sCve.  Cn.  Com.fier'Cson.  wxfir 
We.i-gh.t~  of  exfiLostve.  , 


[2)  Tke  earc&sc.  Will  f n.  production.  be.  ejcja ensCoe  . 

t  jV  T*.  ac .tCon  front  line  Trenches  cLnd  SVpforb  &rc<3S  Would 

/Lav*  be  cleared,  for  /ttepess^se  of  !KZ  profosedfroyectile, 

C 1  irn.g>  Wi  /tTory^r.  r2an»«. . 

&)7JLe  apparatus  will  be.  unwceldlfy  ^ 

^  7/l*  projectile,  could,  mot- 6c  used  during  Macks  because 

itrtTr-cLveU  ufontte  uear/TPs surface. 

(b)  7\e  C  ontiurs  ofHCi.frvfe.ctUe.  Will  mo  t^fer  mxlr  of  ^ood 

7tL***iU  fart-,. 

1)  Jurying  ji.ffeotrcan.rLot- be-  secured  for  demolition 
^^rfasej  j-ucL  as  c an.  lie.  assured.  vUh.Cn.  shell  ft'rc  tTS 
tmfloyed  vut/i^ash  on -fuses  .  Fires  cCx~fj-Ceultrto 
dfl-/  Treasons  -for  f  resuming  tint  tfct.})Tejcctn's  •sound; 
<Zsf  eece/ty  \  Iris  remembered,  ffc&tr  £X  Cst-in.g>m.*cAinerj 
i'n  fti  fi'elot  h.s.s  reached  ahiyh.  •stTi-z.  of  perfection-  • 
Ft-  Cs  suggested  feat  a/l  exfLosrve  carcases  must- 6c 
designed.  set  TtCer  fs  r  bury  in  g  and  tresu  IbCnq  demolition 
•b’ff&ctrj  of  for  missil  e  vuitft  /iiHinqe.ffec.t-ifeff-iecenay 
1-5  to  be  •secured.  tV fi  rtCe-r  of  tfcesc  eiem.e-ntaryprin*-Cftes 
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Naval  Consulting  Board  and  Related  Wartime  Research  Papers 
Subjects  --  Ship  Reports  (Anthracite  Tests)  (1917) 

This  folder  contains  reports  were  submitted  to  Edison  and  the  Naval 
Consulting  Board  by  Miller  Reese  Hutchison.  They  concern  tests f  of  the 
feasibility  of  using  anthracite  rather  than  bituminous  coa!  on  steamships  m 
order  to  reduce  smoke  emissions  and  make  the  ship  harder  f°r  enemy 
submarines  to  detect.  In  addition  to  Hutchesons  cover  letters  there  are 
conclusions  presented  by  J.  P.  Sparrow,  chief  engineer  of  the  New  York 
Edison  Co.,  who  oversaw  some  of  the  tests.  Hutchison  s  correspondence  and 
preliminary  report  to  Edison  can  be  found  in  the  general  correspondence 
folders  for  1917. 

Approximately  30  percent  of  the  documents  have  been  selected 
Unselected  material  includes  technical  specifications  of  the  ships  and  detailed 
logs  of  data  produced  during  the  experiments. 

N  avail  CMsmiWG  Board 

orTHEtsrrEi)  suctes 

SUBJECT  -  Toot  of  Anthracite  Coal  on  Bituminous  Orates. 
HSSEREUCE  -  Verbal  and  telegraphic  instructions  and 
preliminary  reports. 

ENCLOSURE  -  Copy  of  Report  of  Trips  on  Clyde  line  3.  3. 
(HEREWITH)  PAWNEE,  Hew  York  to  Philadelphia  and  return, 
August  28th  to  September  2nd,  1917. 


1.  Your  attention  is  respectfully  directed  to  the 
enclosure  herewith. 

2.  The  tests  on  the  PAWHKE  were  made  as  a  preliminary,  to 
quickly  ascertain  the  practicability  of  using  anthracite  in 
bituminous  grate  furnaces  aboard  ship  equipped  with  forced  draft. 

3.  The  firemen  were  green,  no  facilities  existed  for  tak¬ 
ing  indicator  cards  from  the  engines,  the  water  was  not  weighed 
and  the  coal  consumption  was  arrived  at  by  weighing  the  coal 
left  over  at  end  of  run.  Therefore,  the  values  are  not  to  be 
considered  as  absolutely  accurate. 

4.  Tho  voyage  on  bituminous  coal,  September  lst-2nd  was  as 
fast  a  trip  as  has  been  recorded  by  the  PAWNEE’ 3  log.  Shir  winds 
and  tide  reduced  the  elapsed  time  to  19  hourB,  27  minutes.  You 
will  note,  however,  that  the  average  r.  p.  m.  is  less  than 

the  average  on  the  first  trip,  august  28-29th  in  which  we  peed 
Scranton  anthracite. 

5.  Attention  is  directed  to  the  abnormally  poor  quality 
of  anthracite  (Lehigh  chestnut)  used  on  the  second  voyage, 

August  30-31st.  It  was  about  the  poorest  ooal  1  have  ever 

6.  On  the  whole,  taking  into  consideration  the  inexperience 
of  the  firemen,  the  first  voyage,  August  28-29th  was  quite  a 
creditable  showing. 

7.  The  average  time  between  New  York  and  Philadelphia, 
using  bituminous  ooal  and  under  mine  zone  restrictions  as  to 
speed  on  eaoh  end  is  21  hours. 

8.  A  comprehensive  test  will  be  begun  on  the  Clyde 
Steamship  HURON,  sailing  from  Hew  York  Saturday,  September 
8  th,  at  no6n. 

Sheet  §2 

9.  The  voyage  South,  to  Jacksonville,  sith  a  six-hour 
stop  at  Charleston,  will  ho  made  on  bituminous  cool. 

10,  The  voyugo  North,  to  Now  York,  with  six-hour  atpp  at 
Charleston,  will  be  nude  on  Scranton  Chestnut  coal. 

11.  All  data  usual  in  such  tosto  will  bo  taken  and  a  report 
submittod  as  soon  aftor  my  return  on  September  16th  as  it  will 
be  possible  to  compile. 



Thomas  A,  Edison, 
Orange ,  Hew  Jersey 


To  demonstrate  the  praticability  of  burning  Anthracite 
Goal  in  Scotch  Marine  Boiler  furnaces  equipped  with  grates  de¬ 
signed  for  semi-bituminous  coal. 


Data  and  log  sheets  of  ship's  capacity,  equipment, 
engine  and  boiler  room  operation  and  recording  steam  pressure 
gauge  charts  attached. 

On  first  trip.  Now  York  to  Philadelphia,  August  28th  - 
29th,  ship  was  coaled  v/ith  egg  size  Scranton  Anthracite  of  the 
folio-wing  analysis,  as  fired: 

Moisture  3.7$ 

Volatile  Matter  8.6 
Fixed  Carbon  79.5 

Ash  8.2 

B.T.U.  13191 

Trip  was  started  with  spread  fires  from  a  bituminous 
bank  to  duplicate  as  nearly  as  possible  conditions  which  would 
prevail  at  sea  when  changeover  from  one  kind  of  fuel  to  another 
would  be  necessary. 

The  firemen  had  had  no  previous  experience  in  handling 
Anthraoite  coal  and  were  inclined  to  follow  Bituminous  firing 
methods,  whioh  were  entirely  unsuited  to  existing  conditions. 

No  attempt  was  mode  to  maintain  oonstant  steam  pressure 



by  throttling  the  engines,  although  this  is  the  common  practice 
on  bituminous  coal  trips  when  quality  of  coal  1b  ordinary.  Drop 
in  steam  pressure  at  11:00  p.m.  as  shown  on  pressure  ohart  was 
caused  by  failure  to  cover  fires  properly  at  corners  and  along 
sides  of  fire  boxes. 

Drop  at  4:30  a.m.  was  caused  by  delaying  cleaning  of 
fires  too  long,  and  at  11:00  a.m.  by  slow  recovery  of  two 
freshly  cleaned  and  covered  fires.  (See  conclusions). 

The  routine  of  firing  was  to  cover  at  intervals  averag¬ 
ing  25  minutes  and  barring  with  T  bar  at  intervals  averaging  38 
minutes.  Ho  slicing  was  done,  but  leveling  and  breaking  up  top 
of  fuel  bod  was  done  after  barring. 

Barring  was  to  cut  out  ash  from  under  fire  and  work 
same  through  grates.  This  method  with  coal  which  does  not 
clinker  and  contains  little  slate  1b  the  proper  procedure. 

Total  Anthracite  consumed  -  -  23.6  tons. 

On  second  trip,  August  30th  -  31st,  Philadelphia  to 
New  York,  ship  was  coaled  in  Philadelphia  with  Chestnut  size 
Lehigh  Anthraoite,  analyzing  as  fired: 

Moisture  3.1JS 

Volatile  Matter  6.0 
Fixed  Carbon  76.8 
Ash  14.1 

B.T.U.  12067 

This  ooal  was  of  very  poor  quality,  full  of  slate, 
which  could  not  be  barred  through  the  grates  and  should  have 
been  handled  by  oleanlng  fires  at  least  every  four  hours. 



The  recording  pressure  chart  is  not  comparable  with 
that  of  the  first  trip,  because  of  tho  fact  that  the  engine 
throttle  was  manipulated  to  maintain  pressure  resulting  in 
lowered  average  R.P.U.  of  engines.  (See  summary) 

Too  long  intervals  between  oleaningB  resulted  in 
need  for  simultaneous  cleanings  of  two  or  more  fumaoes,  and 
slow  recovery  of  freshly  covered  fires  prevented  maintaining 
full  steaming  capacity. 

Total  Lehigh  Anthracite  Consumed  -  -  26.5  tons 

Suggested  Routine  for  Proper  Firing 

Start  with  clean  fires;  if  changing  over  at  sea  from 
soft  to  hard  ooal,  change  over  gradually  one  fire  at  a  time. 

Have  hard  coal  fires  bright  and  dean  before  working  over 
other  furnaoeB. 

Establish  a  regular  firing,  barring  and  cleaning 
routine.  The  quality  of  tho  coal  will  establish  the  intervals. 
Firing  intervals  of  from  20  to  30  minutes  for  good  ooal,  do  not 
fire  too  heavily;  lightly  and  often  is  better. 

Bar  fires  with  T  bar  between  firing  periods,  cutting; 
out  the  ash  under  the  fire  and  through  the  grate  bars. 

Break  up  surface  of  fire  with  rake  after  barring 
and  spread  evenly,  do  not  slice. 

Fire  before  cleaning,  so  as  to  bo  buto  and  have  good 
body  of  partially  burned  ooal  for  re-kindling  new  fire. 

Be  sure  and  keep  corners  and  sides  of  firebox  well 
covered;  allow  no  dead  spots  in  fuel  bed.  If  bad  spots  cannot 
be  covered  by  spreading,  it  iB  better  to  put  a  small  quantity 
of  soft  ooal  on  the  bad  spot  than  allow  fuel  bed  to  get  ragged. 



In  cleaning  fires  the  ordinary  routine  1b  to  he  fol¬ 
lowed;  push  the  char  hack  and  draw  out  ash,  draw  char  forward 
and  pull  rear  ash  over  char  to  floor,  spread  ohar  and  cover 
lightly  and  often  until  fire  is  fully  recovered.  Build  up  to 
a  good  active  fire  before  cleaning  another  furnace. 

The  interval  between  cleanings  io  dependent  on  the 
quality  of  the  coal.  As  long  as  the  ash  can  be  barred  through 
grate,  cleaning  is  unnecessary,  but  if  fires  build  up  in  thick¬ 
ness  from  accumulation  of  ash,  dean  and  clean  often;  probably 
from  two  to  six  hours  would  represent  the  minimum  and  maximum 
intervals  due  to  variation  in  fuel  quality. 

Third  trip  was  made  on  soft  coal  to  furnish  data  com¬ 
parable  with  first  and  second  trips.  Performance  is  tabulated 
in  summary  and  data  sheets  attached. 

On  this  trip  wind  and  tides  were  favorable  as  shown 
by  reduood  slip  of  screw. 

Coal  analysis  as  fired: 

Moisture  1.2 i<> 

Volatile  Matter  17.7 

Fixed  Carbon  72.7 

Ash  8.4 

B.T.U.  14040 

Total  Bituminous  Coal  Consumed  -  -  19.5  tons. 





Elapsed  Time 
Diet,  by  log 
Av.  R.P.M. 

Slip  of  wheel 
Av. knots  per  hr. 
Avg. Steam  Press. 

N.Y.  to  Phil. 
Aug.  28-29 

Scranton  Egg 
20  Hrs.7  Min. 
227  knots 
9.1 $ 


Avg. Interval 
covering  fires 

Avg. Interval 
barring  fires 

Coal  oonsumed 

26  Min. 

38  Min. 
ft  23. 5  tons 

Phil,  to  N.Y. 
Aug.  50-51 

Lehigh  Chestnut 

#  21  Hrs.45  Min. 

#  229  knots 



*«■  166  Lbs . 

26  Min. 

27  Min. 
26,6  tons 

N.Y.  to  Phil. 
Sept.  1-2 


«  19  Hrs.  27  Min. 
227  knots 


ft  2.3$ 
ft  11.7 

170  Lbs. 

19.4  Min. 

16.3  min. 

19.6  tons 

st  About  2  l/2  tons  wasted  through  unfamiliarity  with  Anthracite 

o  Engine  not  throttled  when  cleaning  fires. 

«»  Engine  throttled  when  cleaning  fires. 

«  Favorable  wind  and  tide. 

#  Experiments  oonduoted  enroute  to  determine  time  consumed  in 

turning  90  degrees  when  under  full  headway)  wheel  hard  to 
starboard,  two  tests;  wheel  hard  to  port  one  test. 

Result  turning  to  port  106  seconds 

"  "  starboard  116  seconds 



The  successful  burning  of  anthracite  ooal  is  accom¬ 
plished  only  by  adopting  the  proper  size  suitable  for  the  grates 
and  the  corroot  handling  of  the  fires  to  meet  the  steam  demand. 

Semi -bituminous  ooal,  because  of  its  higher  volatile 
contents,  ignites  quicker  and  can  be  burned  at  higher  rates  per 
square  foot  of  grate  surface  than  can  anthracite. 

The  Pawnee  has  3300  square  feet  of  boiler  heating 
surfaoo  equivalent  to  an  evaporation,  at  rating,  of  approximately 
9900  lbs.  of  Y/ater  per  hour.  It  was  impracticable  to  indicate 
the  engines  to  determine  the  water  rate  but  assuming  1100  I,H,P. 
at  a  IS  lb-  rate  or  15,300  lbs.  of  steam  per  hour,  it  is  seen 
that  it  iB  necessary  to  operate  the  boilers  at  35^.  above  rating 
normally.  'There  are  four  furnaces  to  two  boilers,  therefore, 
each  fire  cleaned  reduces  the  normal  steaming  capacity  by  35^. 

This  condition  necessitates  a  firing  routine  that  will 
insure  three  bright  clean  fires  while  the  fourth  is  being  cleaned- 

The  Egg  ooal  used  on  the  first  trip  was  too  large,  it 
was  difficult  to  spread  properly;  for  the  grates  in  question  Pea 
or  Hut  ooal  would  without  doubt  have  been  more  satisfactory. 

There  was  mis judgment  as  to  the  proper  cleaning  periods 
whioh  resulted  in  all  the  fires  needing  oleanlng  at  the  same  time. 

In  a  ship  equipped  with  more  furnaces  the  effect  of 
oleaning  on  steaming  capacity  would  be  lesB  noticeable  as  a  smaller 
proportion  of  grate  surface  would  be  inactive. 

There  should  be  no  insurmountable  difficulties  in  the 
use  of  proper  size  anthraoite  ooal  in  Scotch  boilers  equipped  with 


foroad  draft,  an  effective  draft  of  1-1/2"  being  ample  for  coal 
down  to  Pea  size. 

It  ie  reasonable  to  expect  that  in  shipB^boilered  with 
same  ratio  of  heating  surface  to  engine  horsepower  as  the  Pawnee, 
a  reduction  in  speed  of  approximately  10/  will  result  when  using 
anthracite  but  in  case  maximum  speed  is  demanded,  it  is  always 
possible  to  fire  soft  coal  on  top  of  anthracite  and  recover  normal 
speed  immediately. 

Eavail  €®^tsho"ing  Board 


September  26,  1917. 

Subject:  Burning  hard  coal  in  Scotch  Marine 

Boilers  fitted  with  grates  for  burn¬ 
ing  soft  coal. 

Reference:  (a)  My  letter  of  September  8th  1917. 

(b)  Report  on  trips  of  Clyde  Line 

S.S.  "Pawnee" ,  New  York  to  Phila¬ 
delphia  and  return,  August  28th 
to  September  2nd,.  1917, 

Enclosures  (A)  Report  on  trips  of  Clyde  Line  ;'- 
herewith:  S.S,  "Huron",  New  York  to  Jackson¬ 

ville,  via  Charleston  and  return, 
September  8th  to  September  18th,.. 
1917,  burning  anthracite  and  sami- 
bituminous  coals, 

(B)  Analyses  of  coals  available  in  U»S.A. 

(C)  Letter  from  Mr.  Sparrow  on  Anthracite 

(D)  Formal  letter  from 

The  New  York  Edison  Company, 


1.  The  preliminary  experiment  on.Clyde  Line  S.S,  "Pawnee" 
(references  (a)  and  (b),  having  demonstrated  the  desirability 
of  conducting  a  more  comprehensive  test  on  a  steainship  having 

-  2  - 

a  longer  route,  I  arranged  with  the  Clyde  Steamship  Company 
to  conduct  such  test  on  their  S.S.  "Huron",  plying  between 
New  York  and  Jacksonville,  via  Charleston,  and  departing  from 
New  York  September  8th  193/7. 

2.  The  subject  under  discussion  being  one  of  major  im¬ 
portance,  I  thought  it  highly  desirable  to  avail  myself  of 
the  oft  repeated,  suggestions  of  The  New  York  Edison  Company 

to  call  on  them  for  any  assistance  desired  on  Government  work. 

3.  I  thereupon,  before  the  "Pawnee"  test,  (references 
(a)  and  (b)),  communicated  with  Mr,  John  W.  Lieb,  Vice  Presi¬ 
dent  of  said  Company,  and  from  him  received  an  offer  of  all 
the  engineering  personnel  I  might  require,  without  cosf  to 
the  Government  for  the  services  of  such  personnel. 

4.  I  was  especially,  fortunate  by  reason  of  this  co¬ 
operation,  beoause  I  secured  the  direct  personal  services  of 

the  following  gentlemen: 

(a)  Mr.  J.  P.  Sparrow,  Chief  Engineer  of 
The  New  York  Edison  Company,  a  man 
of  national  reputation  as  an  engineer 
with  an  experience  of,' 30  years  in 
building,  supervising'  and  operating 
Street  Railway  and  Power  Plants,  dat¬ 
ing  from  the  Sprague  Eleotrio  Railway 
Company  and  including  the  Edison 
General  Electric  Company,  General 
Eleotrio  Company  and  The  New  York 
Edison  Company.  He  has  under  his  di¬ 
rect  supervision  and .control  318,500 
kilowatts  (424,600  electrioal  H.P.)  of 
energy,  generated  by  170  boilers  each 
having  a  rating  of  650  H.P.  and  which 
are  operated  normally  at  125$  above  and, 
on  peak  loads  'to  225$  above  rated  oa- 


pacity.  These  boilers  supply  the 
steam  for  operating  18  large  tur¬ 
bines  and  15  large  reciprocating 
engines.  Of  special  importance  is 
the  fact  that  up  to  1913,  The  Hew 
York  Edison  Company  used  exclusive¬ 
ly  #3  Buckwheat  Anthracite  coal  from 
which  a  broad  experience  in  Anthracite 
was  gained.  The  reason  for  changing 
to  semi-bituminous  was  occasioned  to 
meet  labor  conditions  by  installing 
mechanical  stokers,  Mr,  Sparrow  ac¬ 
companied  us  on  the  "Pawnee"  tests, 

(b)  Mr.  J.  D,  Andrew,  Superintendent  cf 
Power  House  Design  and  Operation, 

Edison  Electrio  Illuminating  Company 
of  Boston,  Mass.,  accompanied  us  on 
the  "Huron"  tests.  Mr.  Andrew  has 
under  his  direct  control  and  opera¬ 
tion  106,000  kilowatts  (141,333  Elec¬ 
trio  H.P.)  of  energy  generated  by 
over  60  boilers  of  650  H.P.  each, 
running  at  from  12555  to  22555  overload, 
Mr,  Andrew  was  Chief  Engineer  of  The 
Hew  York  Edison  Company  when  that 
Company  was  burning  anthracite.  He  has 
had  20  years  practical  experience  in¬ 
cluding  positions  of  Assistant  Engineer, 
Metropolitan  Street  Railway  Company, 
Chief  Engineer,  The  Hew  Yorfc  Edison 
Company,  Chief  Engineer,  Boston  Elevated 
System,  eto. 

(o)  Mr.  H.  G.  Reinickor,  Assistant  to  Chief 
Engineer,  The  New  York  Edison  Company, 

(d)  Mr.  E.  B.  Rioketts,  Test  Engineer  and 
Chemical  Engineer,  The  Hew  York  Edison 
Company . 

(e)  Pour  water  tenders  of  The  Hew  York 
Edison  Company  who  have  had  not  less 
than  10  years  experience  each  as  fire¬ 
men  of  anthracite  and  bituminous  coal, 
and  whom  I  took  as  a  precautionary 
measure  in  case  of  trouble  with  the 
regular  firemen. 


-  4  - 

5.  Mr.  William  P.  McGuire,  the  personal  representative 
of  the  Chairman  of  the  U.  S,  Shipping  Board,  was  with  us  on 
the  first  "Pawnee"  voyage,  and  on  the  entire  trip  of  the 
"Huron" ,  He  made  frequent  notations  and  communicated  his 
impressions,  which  were  favorable,  to  Mr..  Hurley  direot.  He 
has  read  and  approved  the  formal  reports  (reference  (b)  and 
enclosure  (A)  hereof). 

6.  Mr.  A.  U,  Hunt,  member  of  the  Naval  Consulting 
Board  and  of  the  Ship  Protection  Committee  of  the  Egiergenoy 
Fleet  Corporation,  has  kindly  supplied  analyses  of  Anthracite 
Coal,  Low  Volatile  Bituminous  Coal  (semi-anthracites),  Bi¬ 
tuminous  coals  approximating  18$  volatile  material,  etc., 
which  I  attaoh  hereto  as  enclosure  (B)  and  which  will  be 
found  of  value  in  the  selection  of  coal  insofar  as  selsdtiCn 
is  possible  with  great  demand, 

7.  X  understand  there  is  available  in  Liverpool  and 
London,  a  Welch  Anthracite  Coal,  whioh  is  free  burning,  and 
which  oan  doubtless  be  oalled  upon  for  return  voyages.  The 
Cunard  Steamship  Company  has  knowledge  as  to  the  availability 
of  this  fuel. 

8.  Enclosure  (0)  herewith, • letter  from  Mr.  J.  P,. 
Sparrow,  very  clearly  Bets  forth  praotioal  experience  ‘in  and 
expedients  that  may  in  some  Cases  be  necessary  for  the  se¬ 
lection  and  use  of  anthracite  as  fuel. 

9.  The  only  remaining  teBt  which  might  be  considered 
desirable  is,  the  determination  of  the  size  and  kind  of  an- 


-  5  - 

thracite  neoessary  in  natural  draft  conditions,  assuming,  as 
a  conclusion,  the  larger  the  coal,  the  less  the  nature}.  draft 
required.  This  test  will  be  made  if  deemed  necessary. 

10.  This  subject  has  been  ably  covered  by  the  personnel 
mentioned,  who  stand  ready  to  make  any  further  demonstration 
which  may  be  deemed  necessary  or  desirable, 

XI.  i  suggest  a  letter  of  appreciation  to  The  New  York 
Edison  Company  and  to  the  Edison  Electric  Illuminating  Com¬ 
pany  of  Boston  for  the  splendid  co-operation  and  assistance 
they  have  rendered. 

12.  I  await  your  further  wishes. 


(Signed)  M.  R.  HUTCHISON,  . 

Member , 

Mr.  Thomas  A.  Edison,  President, 
Mr.  W.  L«  Saunders,  Chairman, 
Naval  Consulting  Board, 

New  York. 



The  teBts  we  have  conducted  aboard  the  Olyde  Line 
Steamers  "Pawnee"  and  "Huron"  have  enabled  us  to  arrive  at 
the  following  definite  conclusions! 

1.  It  is  feasible  and  practicable  to  use  hard  coal  of 
qualities  readily  obtained  in  the  open  market  in  Scotch 
marine  boilers  equipped  with  grates  designed  for  burning 
ordinary  soft  coal: 

(a)  Without  reduction  of  the  steaming  capacity 
of  such  boilers  below  that  obtained  with 
soft  ooal  under  practioal  operating  condi¬ 
tions  . 

(b)  Without  the  production  of  any  smoke. 

2.  All  Bizes  of  hard  coal,  from  Egg  to  Pea,  are  prao- 

3.  The  large  sizes.  Egg  and  Stove 

(a)  Are  somewhat  difficult  to  shovel 

(b)  Are  very  clean  to  handle 

(c)  Are  somewhat  difficult  to  cover  edges  and 
corners  of  grate 

(d)  Roll  considerably  after  covering  when  in  a 
heavy  sea 

(e)  Require  more  labor  than  the  smaller  sizes 
when  o leaning  fires 

(f)  Are  somewhat  sluggish  in  picking  up  after 

(g)  Require  very  little  draft  -  only  about  .3  of 
an  inch 

(h)  Have  a  relatively  small  percentage  of  ash 

(i)  Are  more  expensive  than  the  smaller  sizes. 



4,  The  Pea  size 

(a)  Is  very  easy  to  shovel 

(b)  Is  more  dirty  to  handle 

(c)  Is  very  easy  to  oover  edges  and  corners  of  grate 

(d)  Does  not  roll  in  a  heavy  sea  after  covering  fire 

(e)  Requires  a  more  frequent  cleaning  of  fire 

(f)  Is  very  quickly  ignited  after  covering 

(g)  Requires  a  maximum  draft  -  about  1  inch 

(h)  Has  a  larger  percentage  of  ash 

(i)  Is  the  least  expensive 

5,  Chestnut  size  we  consider  the  best  for  foroed  draft 
use  because 

(a)  It  is  easy  to  shovel 

(b)  Is  not  dirty  to  handle 

(c)  Is  easy  to  cover  edges  and  corners  of  grate 

(d)  Does  not  roll  in  a  heavy  sea  after  covering 

(e)  Requires  but  little  labor  in  cleaning  fire 

(f)  Ignites  quickly  after  covering 

(g)  Requires  only  about  5/8 : of  an  inch  draft 

(h)  Has  not  a  high  percentage  of  ash  and  does  not 
require  too. frequent  cleaning  of  fire 

(i)  Is  not  very  expensive 

6,  Free  burning  anthracite  is  the  most  desirable. 

7 ,  Any  intelligent  f ireroom  f oroe  oan  be  taught  to  fire 
hard  coal  effectively  within. a  very  short  time. 

8,  The  relative  costs  of  operation  using  anthracite  or 
soft  coals  can  be  approximated  only  by  assuming  the  heat 



values,  firing  losses  and  coal  prices. 

9.  The  relative  heat  value  can  be  assumed  as  12800 
B.T.U's  per  pound  for  anthracite  coal  and  14000  B.T.U'b  for 
soft  coal  or  a  difference  of  9$. 

10.  The  firing  losses  due  to  lowered  efficiency  because 
of  excess  air  and  combustible  in  the  aBhea  due  to  cleaning 
can  be  assumed  as  6 fo. 

11.  Therefore  it  is  to  be  expected  that  15^  more  an¬ 
thracite  will  be  used  than  sdfit  coal,  all  other  conditions 
being  equal. 

12.  Oh  the  basis  therefore  of  soft  coal  at  $3.65  per 
long  ton  and  chestnut  anthracite  at  $6.25,  the  present  market 
price,  the  relative  operating' costs  v/ill  be  in  the  ratio  of 

1  to  1.71. 

13.  It  must  be  borne  in  mind  that  the  soft  coal  prioe 
assumed  is  the  price  established  by  the  United  States  Govern¬ 
ment  for  mine  deliveries  with  freight  added  to  New  York 
Harbor,  and  that  ooal  delivered  under  term  contracts  would 
carry  a  different  price. 

(Signed)  3  P  SPARROW,  Chief  Engineer 

The  New  York  Edison  Company 

■3  D  ANDREW,  Superintendent  Power 
Plant  Design  . 

Edison  Elec  Illg  C.o  of  Boston 

N  G  REINICKER,  AsBt  to  Chief  Engineer) 
The  Hew  York  Edison  Company 

•  E  B  RICKETTS,  Engineer  of  Tests, 

The  New  York  Edison  Power  Plant 

WILLIAM  F  MAGUIRE,  Special  Repres 
sentative  of  G  N  Hurley,  Chalrtnanr 
Federal  shipping  Board 

M  R  HUTCHISON,  Member*' NaVal 
suiting  Board* 



September  25,  1917, 

Ur.  M,  R.  Hutchison, 

Member  Naval  Consulting  Board 

of  the  U.  S.  of  America, 

Orange,  N.  J. 

Dear  Dr.  Hutchison: 

In  connection  with  both  the  preliminary  and  the  final 
tests  conducted  on  the  Clyde  Line  steamers  Pawnee  and  Huron,  I 
have  thought  it  best  to  indicate  in  some  notes,  separate  from 
the  general  reports,  my  conclusion  in  connection  with  the 
matter  of  burning  anthracite  coal  in  Scotoh  Marine  boiler 
furnaces,  such  conclusion  being  based,  on  long  experience  in 
using  steam  sizes  of  anthracite  coal  in  the  stations  of  The 
New  York  Edison  Company, 

Anthracite  coal  varies  widely  in  quality  and  par¬ 
ticularly  so  in  recent  years  because  of  the  exceedingly  poor 
preparation  which  is  now  given  to  this  product.  In  consider¬ 
ing  the  use  of  anthracite  coal,  however,  it  is  my  judgment 
that  selection  of  quality  within  very  narrow  limits  is  im¬ 
practicable.  To. accomplish  the  result  you  desire  it  will,  I 
believe,  be  neoeesary  to  accept  commercial  coal  as  marketed, 
and  it  is  my  opinion  that  such  coals  as  have  been  used  on  the 
three  trial  trips  made  can  be  fairly  classed  as  commercial 
products . 

Without  doubt,  free  burning  ooals  are  most  desirable, 
these  coals  being  mainly  obtainable  from  the  northern  Pennsyl¬ 
vania  fields  and  comprise  the  coals  of  the  Scranton,  Pittston 
and  Wilkes  Barre  regions. 


"  "  35  Sept  17 

Usually  the  percentage  of  ash  increases  as  the  size 
of  prepared  sizes  decreases,  the  steam  sizes  usually  running 
from  twelve  to  seventeen  per  cent,  ash,  the  domestio  sizes 
from  six  to  ten  per  cent,  ash. 

Ability  to  burn  any  fuel  depends  on  available  draft.” 
With  bituminous  coalB  the  coking  qualities  necessitate  the 
breaking  up  of  the  fuel  bed  to  allow  free  admission  of  air. 
With  anthracite  coals  this  is  not  neoessary  unless  clinker 
forms,  in  which  case  some  breaking  up  may  be  necessary,  but 
clinker  usually  indicates  necessity  for  cleaning  fire. 

For  sizes  of  anthraoite  coal  down  to  Pea  one  inch  of 
effective  draft  is  the  maximum  required,  and  this  effective 
draft  whether  forced,  induced  or  natural,  produces  the  same 
final  result. 

Forced  draft  when  produced  by  auxiliary  steam  below 
the  fuel  bed  reduces  to  some  extent  the  formation  Of  clinker, 
but  it  must  be  borne  in  mind  that  steam  in  the  furnaces  leads 
to  somewhat  lower  efficiencies  because  of  the  water  vapor  being 
oarried  away  at  stack  temperatures. 

It  has  been  suggested  that  it  might  be  advantageous 
tp  use  a  mixture  of  anthraoite  and  bituminous  coals,  resulting 
in  freer  ignition  and  probable  smokeless  combustion. 

The  New  York  Edison  Company  for  many  yearB  used  such 
mixtures  in  its  power  plants,  and  I  can  say  with  certainty  that 
such  practice  would  not  produce  satisfactory  results  under  the- 
conditions  of  use  on  shipboard  for  the  following  reasons: 





-  3  - 


25  Sept  17 

.  It  is  practically  impossible  to  secure  proper 

mixtures  unless  mixed  by  measurement  on  the 
firing  floor.  Such  mixtures  as  are  neoessary 
will  separate  by  gravity  if  mixed  in  the 
bunkers  and  produce  uneven  firing. 

b  With  a  mixture  of  anthraoite  and  semi -bituminous 

coal  it  is  necessary  at  timeB  to  break  up  the 
fuel  bed,  this  operation  resulting  in  some 
smoke  even  with  most  expert  firing  methods. 

o.  Mixtures  often  if  not  always  change  the  fusion 

point  of  the  ash,  which  if  lowered  results  in 
bad  clinkering. 

in  conclusion  I  would  state  that  in  my  Judgment  there 
is  no  difficulty  whatever  in  using  as  proposed  the  commercial 
anthraoite  coals  obtainable,  if  intelligent  supervision  is 
given  to  firing  methods,  and  that  steam  and  speed  c'an  be  main¬ 
tained  equally  well  as  with  semi-bituminous  coal,  the  only 
difference  in  results  being  the  somewhat  slower  response  to 
abnormal  demands  for  steam.  Immediate  response  to  such  de¬ 
mand,  may,  however,  be  obtained  by  firing  semi-bituminous  coal 

on  top  of  the  anthracite  bed. 

I  trust  that  these  few  notes  will  indioate  dearly 
my  judgment  as  to- the  feasibility  of  using  anthracite  coals  a 
proposed,  and  I  trust  that  results  as  shown  by  both  prelim¬ 
inary  and  final  tests  will  have  borne  out  this  expression  of 



yours  very  truly, 

(Signed)  J.  P»  SPARROW 
Chief  Engineer. 


■September  SR,  1917, 

Miller  Reeae  Hutchison,  E.E.,  Fh.  D., 

Member  Haval  Consulting  Board  of  the  U.S.  of  America, 
Orange,  N.  J. 

X  hand  you  herewith  report  of  the  trip  of  the  Clydo 
Line  S.S.  Huron,  Hew  York  to  Jacksonville  and  return,  to 
demonstrate  the  feasibility  of  burning  anthracite  coal  in 
Scotch  Marine  boiler  furnaoes  designed  for  bituminous  coal  use. 

This  trip  made  at  the  request  of  Mr.  Edison  was  muds.' 
under  the  direction  of  the  personnel  of  the  Operating  Depart¬ 
ment  of  The  New  York  Edison  Company  assisted  by  Mr.  J.  D. 

Andrew  of  the  Edison  Electric  Illuminating  Company  of  Boston. 

The  results  of  this  test  are  conclusive  so  far  as 
proving  the  ability  to  maintain  steam  pressure  and  engine  speed 
under  all  conditions  of  weather;  no  difficulties  having  been 
experienced  from  quality  of  coal  or  from  personal  equation  of 
the  steamship  foroe  when  properly  instructed  in  the  use  of 
this  type  of  fuel. 

I  wish  to  assure  you  of  the  wish  of  The  New  York 
Edison  Company  to  co-operate  as  you  may  desire  in  the  carrying 
on  of  this  and  similar  work,  and  its  organization  is  at  your 
disposal  as  already  expressed  to  Mr.  Edison  by  our  Mr.  J.  W. 
Lieb,  Vice  President. 

I  shall  be  glad  to  have  you  oall  on  me  personally  fax 
any  assistance  that  I  may  be  able  to  render  in  line  of  this  o. 

Yours  very  truly, 

(Signed)  J.  P.  SPARROW 

Chief  Engines] 

Naval  Consulting  Board  and  Related  Wartime  Research  Papers 
Subjects  -  Ship  Sinkings  (1917) 

This  folder  contains  correspondence  and  other  documents  relating  to 
Edison's  work  on  defending  U.S.  shipping  against  German  submarines. 
Included  are  letters  about  strategy  to  Josephus  Daniels,  U.S.  Secretary  of  the 
Navy,  and  Sir  Eric  Geddes,  First  Lord  of  the  Admiralty.  Also  included  are 
undated  technical  notes  and  drawings  by  Edison,  along  with  information  from 
the  Bureau  of  Statistics  regarding  vessels  engaged  in  the  foreign  trade. 

Approximately  10  percent  of  the  documents  have  been  selected.  The 
unselected  material  includes  long  lists  of  geographical  data  (approximately  60 
pages)  concerning  ship  sinkings  in  European  waters  compiled  by  Edison,  as 
well  as  similar  lists  by  William  H.  Meadowcroft.  Also  not  selected  are 
numerous  tables  and  rough  calculations,  along  with  draft  documents 
concerning  submarine  strategy,  most  of  which  are  unsigned  and  undated  and 
do  not  appear  to  be  directly  related  to  Edison. 


Washington,  D.  C., 

Ilovember  2lBt,  1917. 

Sir  Eric  Geddes, 

London,  England. 

Hy  dear  3ir:- 

X  herewith  forward  some  Strategic  Haps  prepared  for  use 
in  diminishing  the  sinking  of  Cargo  boats  by  Submarines. 

Hap  no.  1  showB  all  the  shipB  which  pass  in  and  out  of 
the  Ports  of  Great  Britain  and  Prance  in  one  day.  The  sta¬ 
tistics  are  for  1913,  no  later  data  being  possible. 

Prom  this  map  it  will  be  seen  that  the  handling  of  this 
vast  systom  of  traffic  in  such  a  manner  as  to  minimize  the  sinkings 
reauires  a  man  or  men  of  imagination. 

Hap  Ho.  2  shows  at  one  glance  all  the  vessels  and  their 
exact  position  that  hove  actually  been  sunk  from  February  1, 

1917,  io  October  12,  1917. 

ThiB  map  has  been  compiled  from  all  the  data  available, 
given  me  by  the  American,  French  and  English  Governments. 

The  maps  of  these  governments  are  so  many  in  number  und  fill¬ 
ed  with  ao  much  general  information  not  directly  pertaining 
to  the  boats  actually  sunk,  that  they  are  complicated  and  no 
human  being  could  ever  draw  a  general  conclusion. 

Hap  Ho.  2  is  the  result  obtained  from  many  maps  put  on 
one,  and  shows  the  boats  Bunk  by  a  submarine,  without  any 



other  matters  to  3  confuse  the  mind.  The  smaller  maps,  3,  4, 
6,  etc.,  Illustrate  the  strategic  plans. 

Strategic  recommendationB:- 

lst.  Send  cargo  boats  across  to  Franoe,  or  along 
tho  English  Channel  only  at  night.  Ho  cargo  boat  should  ap¬ 
pear  in  the  Channel  in  daylight. 

2nd.  Ho  cargo  boat  should  enter  or  leave  any  Eng¬ 
lish  or  French  port  except  at  night.  The  whole  of  the  night 
should  be  utilized  for  approaching  or  leaving  the  coast  und 
with  the  least  delay  and  best  Bpeed  possible. 

3rd.  The  density  of  traffic  is  very  great  fit  cer¬ 
tain  spots,  and  very  dangerous.  Stop  this  and  route  your 
ships  to  diminish  the  density,  end  sproad  the  traffic  over 
the  whole  coast  of  France,  England,  Ireland  and  Scotland,  as 
shown  in  Map  Ho.  4  and  not  as  now,  Bhown  in  Map  Ho.  3. 

4th.  Shorten  the  lino  of  traverse  througi  the  danger 
zone  as  far  as  possible. 

After  having  passed  thru  one  zone  and  reached  an  English 
or  French  port,  do  not  attempt  to  pass  thru  another  danger 
zone,  but  coast  by  night  only  to  tho  port  of  ultimate  destina- 

with.  The 

i„  tho  Atlcntic,  ma  tho  ml  mhnarliio  vhich  only  tro- 


quent  waters  of  100  fathoms  or  Iosb, 

By  routing  the  whole  of  your  traffic  aB  per  Map  Ho.  4. 
you  make  it  necessary  for  the  Enemy  to  build  and  operate 
several  times  as  many  ocean  going  submarines  as  they  now  oper¬ 
ate  to  sink  ships  at  the  present  rate.  As  for  the  sma.  1 
submarines,  the  passing  of  the  traffic  by  coasting  at  night 
v/ill  almost  nulify  their  efforts. 

6th,  It  will  be  noticed  by  referring  to  Map  Ho. 

2  that  most  of  the  ships  have  been  Bunk  in  the  lanes  shown 
by  sailing  oharts  published  by  the  different  Governments. 

Boats  from  abroad  make  tho  Eastnet  Light,  the  Scillys, 
or  Ushont.  Tho no a  by  day  tho  Captains  rim  by  Bight  from  point 
to  point  along  the  coast,  and  at  night  by  the  lighthouses. 

The  Germans  knowing  this,  plaoe  their  submarines  in  this  line 
and  enfilade  them. 

You  will  note  that  in  raid-channel,  between  tho  Scillys 
and  the  Bristol  Channel  and  Irish  Coast,  scarcely  any  ships 
have  been  sunk  on  account  of  the  Captains  of  Bhips  clinging 
to  the  old  sailing  laneB. 

It  is  not  necessary  for  submarines  to  cruise  around  to 
find  ships,  as  has  been  assumed.  This  would  be  a  waste  of 
oil  when  ships  are  so  plenty.  Submarines  do  move  around, 
probably  on  account  of  the  destroyers  and  chasers,  but  not 
by  reason  of  not  finding  boatB  to  si  nk. 


7th.  I  find  that  -up  to  Juno  lot,  1917,  only  1955 
of  the  oaxgo  boats  going  in  and  out  of  England  and  France  had 
any  wireless.  I  suppose  this  has  now  been  readied,  otherwise 
it  diminishes  greatly  the  value  of  the  destroyers 4 

But  what  is  more  serious, -and  absolutely  necessary  in 
order  to  wort  strate6ic  plans, -is  the  installation  on  each 
cargo  boot  of  a  modem  wire  and  tube  sounding  apparatus.  With 
this  the  boats  can  be  continuously  mating  soundings  without 
lowering  their  speed,  thus  determining  their  position  by  means 
of  the  hydrographic  charts  and  enabling  them  to  mate  anchorage 
at  a  good  port  under  any  condition  of  weather,  or  gale,  with¬ 
out  running  for  some  sight-point,  lite  the  Fastnet.. 

I  am  told  that  only  naval  vessels  and  some  of  the  very 
large  cargo  boats  have  this  sounding  apparatus.  The  coat  is 
small  and  the  operation  simple,  and  I  strongly  nrge  that  all 
boats  should  be  supplied  with  them  by  the  Government. 

8th.  If  you  can  partially  blind  the  enemy,  you  have 
him  at  a  great  disadvantage.  If  you  can  blind  him  entirely, 
you  have  him  whipped.  Those  night  operations  are,  of  course, 
equivalent  to  a  Camouflage  of  high  efficiency.  She  Camouflage 
can  of  course,  be  carried  on,  in  a  measure,  when  running  thru 
the’ danger  sene  in  daylight,-  but  not  if  bituminous  coal  is  to 
be  used  on  cargo  boats.  The  smoke  makes  the  use  of  a  large 
number  of  submarines  by  the  enemy  unnecessary. 

Eliminate  Hie  smoke  ana,  all  other  tilings  being  equal, 
the  number  of  submarines  necessary  to  get  the  same  number  of 
sinkings  must  be  doubled.  Cut  off  the  masts,  vhich  are  no 
longer  of  any  use;  cut  down  the  smoke  Btack  to  a  minimum; 
close  the  gaps  between  the  various  deck  constructions  on  the 
Bhips  by  canvas  to  make  an  even  contour,  and  a  still  further 
number  of  BubmarineB  will  be  roauired.  In  addition  to  this, 
all  boatB  which  cross  the  danger  zone  in  an  easterly  or  west¬ 
erly  direction  should  sail  in  line  with  the  rays  of  the  sun, 
or  what  I  call  "shadow  sailing".  Shadow  sailing  is  sailing 
to  keep  the  bow  or  stern  of  the  boat  pointed  as  near  as  possi¬ 
ble  to  the  sun.  Hap  Ho.  6  shows  the  direction  and  mileage  in 
•fchtt  sianmor  onfl  Llap  Ho«  5  in  the  winter • 

She  advantage  of  shadow  sailing  is  that  it  lends  itself  to 
camouflaging  devices.  It  will  be  noted  by  referring  to  Haps 
Ho.  5  ana  Ho.  6  that  the  loss  of  carrying  capacity  for  a  round 
trip  is  very  very  small  when  Shadow  sailing  is  followed. 

I  will  furnish  you  with  camouflaging  devioeB,  later  on.  I 
shall  go  to  soa  next  week  to  perfect  them. 

In  Hap  Ho.  18  you  will  find  a  plan  whereby  night  oamouflag-;. 
ing  is  carried  to  the  limit.  Y/hon  a  boat  arrives  say  260  miles 
from  the  port  which  she  intends  to  enter,  it  should  be  in  the 
evening.  She  then  runs  all  night,  and  at  the  break  of  day  she 
will  stop.  There  will  be  several  shipB,  if  convoy  system  is 


used,  and.  at  this  point  the  deBtroyors  meet  them. 

They  keep  up  stoam  and  move  at,  say,  two  knows:  an  hour  in 
a  narrow  area,  say,  of  ten  miles,  surrounded  with  destroyers, 
cruising  at  required  speed.  A  very  small  amount  of  American 
or  Welsh  snthracito,  or  gas  house  coke  should  he  used  for  a 
few  hours  vhon  sun  is  bright  enough  to  show  smoke.  Oil  burning 
destroyers  only  to  be  used,  no  smoko  being  emitted. 

As  night  comes,  ttie  cargo  boats  proceed  to  the  second  and 
final  night  run  without  destroyers.  Outgoing  boats  should  pro¬ 
ceed  from  one  harbor  and  ingoing  to  anothor,  or  all  inbound 
boats  go  in  one  day  and  outgoing  another  day.  This  would  pre¬ 
vent  collisions,  as  an  eleven  knot  boat  would  not  bump  very 
hard  into  a  ten  knot  boat,  both  going  in  the  same  direction. 

It  also  becomes  unnecessary  to  have  eny  lights  whatever  as 
there  are  no  destroyers  with  the  boats  at  night.  Zig-zagging 
is  unnecessary  at  night,  hence  cargo  boats  could  make  thill' 
normal  speed. 

At  first  thought,  it  would  appear  that  half  a  dozen  cargo 
boats  emerging  from  the  night  and  practically  stopping  would 
be  dangerous  although  destroyers  wore  cruising  in  close  prox¬ 
imity,  but  a  device  whioh  I  have  made  for  determining  the  number 
of  cargo  boats. sighted  by  submarines  in  various  unknown  positions 
shows  that  when  a  boat  iB  about  to  or.ter  a  zono  in  which  there 
is  one  or  more  submarines  and  proceeds  120  miles  thru  such  a 

— 6— 

zone  by  dayligit,  it  is  far  safer  to  stop  otill  in  one  twelfth 
of  the  zone  then  to  pass  thru  the  whole  of  it.  The  ohance  of 
being  sigited  is  very  much  smaller. 

Of  all  cargo  boats  sunk,  less  than  7$  have  boon  sunk  in 
the  dork.  You  will  note  considerable  sinkings  around  Hull. 

The  boats  for  Ilarvik  for  ore  should  go  in  and  out  at  night 
and  spread  themselves  as  much  as  possible.  X  have  a  plan  in 
Tn-infl  of  which  X  will  Bend  particulars  if  you  are  interested. 

I  think  that  boats  arriving  at  and  leaving  ports  along  the 
East  Coast  Bhould  also  run  only  at  night. 

All  those  schemes  apply  only  to  the  ten  and  eleven  knot 
cargo  boats.  As  to  the  fast  steamers,  they  are  in  a  much  more 
favorable  position  if  this  strategy  is  adopted. 

While  1  have  no  information,  X  suspect  that  you  have  paBB- 
ed  those  fast  steamers  across  the  English  Channel  by  nighty 
Otherwise  I  cannot  understand  vhy  you  have  been  eo  successful 
with  troop  ships. 

I  suggest  you  establish  a  routing  office  coordinating 
with  the  Amorican  and  French.  This  office  sgould  be  open  at 
all  hours,  running  three  shifts;-  two  men  on  duty  per  shift. 

One  of  the  so  men  Should  be  familiar  with  the  technique  of  navi¬ 
gation;  the  other  a  bright  successful  business  man,  and  both 
young.  The  office  should  have  wireleSB  and  regular  telegraph 
and  telephone  connections  and  oporators. 

It  iB  probable,  in  faot  certain,  that  if  the  statements 

X  have  made  axe  put  up  to  the  average  Haval  Officer,  ho  will 
at- one o  make  a  lot  of  objections,  because  these  views  differ 
from  his  previous  experience,  or,  possibly,  from  a  lack  of 
imagination  if  my  statements  do  not  appeal  to  hi*.  In  such  a 
case,  I  would  request  that  such  objections  be  reduced  to  writ¬ 
ing,  signed  by  the  objector,  and  forwarded  to  me  for  answer. 

I  will  send  other  suggest  ions  for  hunting  submarines, 
especially  a  scheme  for  employing  your  submarines  to  great 
advantage ,  for  this  purpose,  but  I  must  first  try  some  further 
experiments  at  sea. 

Washington,  D.  , 

Hovember  24,  1917.' 

Sir  Eric  Geddis, 

London,  England. 

Doar  Sir:- 

A  plan  whereby  English  submarines  oan  in  places  be  used 
to  sink  German  submarines  operating  along  ooaBts. 

Take  for  instance  the  English  Channel. 

1.  Conduct  all  traffic  across  the  Channel  and  along 
the  Channel  by  night  as  set  out  in  Strategic  Maps  already 

2.  Withdraw  all  Chasers,  destroyers  and  armed 
boats  from  the  Channel,  or  a  section  thereof. 

3.  District  Channel  off  in  several  areas.  In  each 
area  place  one  English  submarine  and  one  only. 

4.  See  that  English  submarine  has  same  kind  of 
periscopes  as  to  length,  diameter,  distance  apart  and  general 
appearance  as  a  German  submarine. 

B.  How  operate  to  torpedo  the  Enemy" b  boat.  The 
English  Commander  knows  that  there  is  only  one  English  sub¬ 
marine  in  the  area;  that  any  other  muBt  be  a  German  und  that 
he  need  not  fear  being  Bhot  at  as  there  are  no  armed  boats 
in  the  area. 

6.  The  Gorman  will  not  be  certain  about  the  other 

boat  as  he  does  not  know  armed  boatB  are  absent,  and  would 
feel  assnred  that  the  English  would  bo  very  unlikely  to  send 
out  submarines  for  foar  of  their  own  destroyers  and  he  would 
not  be  certain  that  the  German  Havy  had  not  sent  out  another 
German  boat  without  notification  ,  Both  boats,  in  the  event 
of  these  suppositions  miscarrying,  would  in  any  event  have 
an  even  ohanoe. 

As  I  said  in  my  last  communication,  I  am  going  to  sea 
shortly  and  believe  I  can  outfit  the  English  submarines  so 
the  Enemy  submarines  would  have  no  ohanoo  to  eBoape  and  the 
English  submarines  would  run  no  riBk.  This  will  be  a  very 
tiokllsh  experiment  to  try  here  in  America  on  account  of  so 
many  Germans  around  and  I  may  not  get  on  opportunity  at  onoe, 

Yours  tfhly, 


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Naval  Consulting  Board  and  Related  Wartime  Research  Papers 
Subjects  --  Underwater  Sound  Detection  Reports  (1917) 

This  folder  contains  correspondence  and  other  documents  pertaining 
to  sound  detection  experiments  conducted  by  Edison  and  Absalom  M. 
Kennedy  at  Sandy  Hook,  New  Jersey,  and  at  Greenport,  Long  Island,  near 
Sag  Harbor.  The  documents  consist  primarily  of  reports  by  Kennedy  regarding 
the  use  of  audion  amplifiers  to  detect  torpedoes  from  moving  boats,  included 
are  descriptions  of  the  various  configurations  of  underwater  listening 
apparatus  and  the  results  of  field  tests  on  towed  models.  The  experiments 
were  conducted  in  conjunction  with  Navy  tests  of  E.  W.  Bliss  Co.  torpedoes 
fired  from  the  USS  Emblane.  In  addition,  there  are  notes  and  drawings  by 
Edison,  many  of  them  unlabeled  and  undated,  along  with  some  technical 
material  by  Lee  De  Forest,  inventor  of  the  audion  tube.  Edison  employees 
involved  in  the  experiments  include  Jerry  T.  Chesler,  E.  Rowland  Dawson, 
John  A.  Hanley,  Sherwood  T.  ("Sam")  Moore,  and  Samuel  C.  Shaffner.  Also 
included  are  letters  discussing  general  progress  and  personnel  matters 
addressed  to  Edison  or  his  personal  assistant,  William  H.  Meadowcroft  and 
an  undated  letter  of  resignation  by  Dawson.  The  last  document  contains  a 
notation  by  Meadowcroft  regarding  Edison's  decision  to  discharge  Kennedy. 
Related  material  can  be  found  in  the  general  correspondence  folders  for 

Approximately  70  percent  of  the  documents  have  been  selected.  The 
unselected  items  consist  primarily  of  duplicates,  rough  notes  on  unrelated 
subjects,  and  other  notes  not  directly  connected  to  Edison. 


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.  fe  (i-oMW'l'.  #/  v^4,  " 

i:r.  Edison  did  not.  understand  tlio  relative  values  of  the 
raccivor  shunt  box  ficuroo  icon  the  curve  which  you  hindly  sale  out 
and  I  attempted  to  translate  into  a  porcontarro  system  which  is  more 
ir.tollif.-^blo  to  him. 

Ho  ashed  mo  to  wrlto  and  find  from  you  if  this  is  correct. 

"ho  first  co lrmn  represents  the  box  roadir.r;,  the  second 
is  from  your  curvo  J>f  relative  curror-t  value;  the  third, 
usinr  tie  valuos  of  the  second  would  reprosor.t  tho  r  lativo  amounts 
of  currant  throuch  tho  rocolvor  ai  d  would  ;:lv°  'JS  a  rolative  value  of 
tho  sounds.  It  is  thl3  column  which  hr.  Edison  raquosts  you  to 
confirm  or  correct. 



















26.  6 


32  2.91 

34  2.4;; 

36  1.91 

38  1.5l 

40  1.25,1 

42  1.  1 

44  .8  1 

46  .  .65,1 

40  .52:1 

50  .41,1 

52  .341, 

54  .271 

56  .21,1 

50  .16,1 

60  .14,1 

Uoinc  200  ohms  ae  the  impodanco  of  the  receiver,  those  do 
not  orrae  with  tho  rolative  currents  which  should  flow  through  tao 
receiver  according  to'  tho  valuos  of  the  shunt  and  series  resistances 
as  pi  von  in  tho  blue  print  which  you  sent. 

fhanlci nr:  you  for  yout  assistance  in  nottlnp  noiso  out  and 
talh  in  the  amplifier  circuit  and  far  your  attention  and  criticisr. 
above  flpuros. 


Youro  vory  truly. 


Sketch  No. 

Repeater  Apparatus  14-37607 

Western  E/ecfric  Company, 



liar  oh  31,  1917 

MR.  A.  M.  KENNEDY, 

o/o  Thomas  A.  Edison  Company, 
Orange,  Hew  Jersey. 

Bear  Sir:- 

In  accordance  with  your  telephone 
conversation  with  Mr.  Scriven,  we  are  sending 
you  today  by  special  messenger  six  (6)  type 
"T"  vacuum  repeater  bulbs  and  three  (3)  type 
"I"  vacuum  repeater  bulbs. 


Research  Engineer 

By  special  messenger 
Mine  (9)  bulbs. 

\sot6n^ocr'crbx  cct 



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”^D  ~t/vj  "to  -^CCAAA^'flJs.  • 

ID.1 .  A.  Li.  Kennedy, 

c/o  ID-.  C.  P.  Irwin, 
Union  Street, 

Hed  3arik,  ii.J. 

Dear  ID'.  Kennedy:  . 

ID'.  lidieon  asks  that  I  send  you 
the  two  following  memorandums : 

(1)  Che  Chatterton  Compound  may  not 
stick  to  brass,  but  if  you  burn  a  piece  of 
soft  rubber,  set  it  on  fire,  it  will  burn  and 
melt.  Che  thick  tar  you  obtain  will  stick 
to  metal  and  the  Chatterton  compound  will 
stick  to  the  tar.  You  should  use  also  the 
Gutta  Poreha  sheet  instead  of  tape  which  soaks 
in  water  and  is  no  pood.  Use  warm  iron  or 
hot  olseo  above  a  flame  which  softens  it  and  makes 
it  adhere. 

(2)  Why  can't  you  build  a  sound-proof 
booth  on  the  deck.  3X3  -  4  ft.  high  would 
do . 

Yours  very  truly, 


7  to 


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Ur.  A.  LI.  Kennedy, 
c/o  C.  P.  Irvin, 

Union  Street, 
ilea  Bank,  li.J. 

Liy  dear  LIr.  Kennedy: 

lio.  4: 

Ur.  Kdison  wants  me  to  write 
and  say  to  you  that  when  you  fret  a  good  chance  ho 
wants  you  to  try  lio.  3,  with  and  without  funnel, 
and  please  to  he  very  sure  about  it,  as  he  wants 
to  determine  the  value  of  the  funnel. 

'fours  very  truly, 

P.  S. 

I  shall  have  no  means  of  knowing  whether  you 
receive  the  various  letters  X  send,  and  so  I  will 
start  and  number  them.  Shis  is  the  third  or  fourth 
letter  that  I  have  sent  down  to  Rod  Bank,  so  we  will 
call  this  number  four,  and  will  number  them  consecutively 
following  this . 


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Articles  of  agreement,  made  and  entered  into  this  twenty 
eighth  day  of  September,  Nineteen  hundred  and  seventeen,  by 
ITaxaraillian  Zwickl  of  the  city  of  Hoboken,  county  of  Hudson, 

State  of  Hew  Jersey,  of  the  first  part,  and  Thomas  A.  Edison,  of 
East  Orange,  county  of  Essex,  State  of  New  Jersey,  of  the  second 

WITNESSETH:  the  said  party  of  the  first  part  has  this  day 
chartered  and  hired  unto  the  said  party  of  the  second  part  steam 
yacht  "Hydraulic",  registered  by  that  name  at  the  Hew  York  Custom 
House,  port  of  New  York,  eighty  five  feet  long,  twelve  feet  beam, 
six  feet  draft,  with  all  the  appurtenances  which  belong  to  said 
steamboat,  for  the  term  of  one  month,-  commencing  the  first  day 
of  October,  nineteen  hundred  and  seventeen  and  ending  the  thirty 
first  day  of  said  month,  nineteen  hundred  and  seventeen,  to  be 
delivered  by  the  party  of  the  first  part  to  the  said  party  of 
the  party  of  the  S 6cohd  part  at  Fifteenth  street  dock  in  the  said 
city  of  Hoboken,  at  which  place  said  boat  shall  be  re-deliverea 
to  the  said  party  of  the  first  part  upon  the  expiration  of  this 

For  the  use  of  said  steamboat  the  said  party  of  the  second 
part  agrees  and  binds  himself,  his  heirs,  executors  and  adminis¬ 
trators  to  pay  to  the  said  party  of  the  first  part  Ten  dollars  a 
day  during  the  continuance  of  the  term  of  this  charter,  payments 
to  be  made  as  follows:  One  hundred  and  fifty  five  dollars  on  the 
first  day  of  October,  Nineteen  hundred  and  seventeen,  and  One 
hundred  and  fifty-five  dollars  on  the  fifteenth  day'  of  said  month. 
Nineteen  hundred  and  seventeen.  And  it  is  further  understood 
that  the  said  party,  of  the  second  pary  shall  be  at  all  the  expense 
of  manning  and  furnishing  said  boat  for  the  time  above  stated,  ex¬ 
cepting  that  the  paid  party  of  the  first  part  shall  furnish  a 
competent  engineer;  and  said  party  of  the  second  part  shall  return 
the  said  boat  to  the  said  party  of  the  first  part  at  the  Fifteenth 
street  dock  in  the  city  of  Hoboken  as  aforesaid  in  as  good  condition 


as  it  was  at  the  time  of  its  delivery  to  the  said  party  of  the 
second  part,  with  the  exception  of  the  ordinary  use  and  wear; 
and  if  the  said  party  of  the  second  part  shall  at  any  time  refuse 
to  carry  out  his  part  of  this  agreement  the  said  party  0f  the  first 
part  shall  have  the  right  to  take  possession  of  the  said  boat  when¬ 
ever  found. 

In  witness  whereof ,  the  parties  have  hereunto  interchangeably 
set  their  hands  and  seals  the  day  ana  year  above  written,  this 
agreement  being  executed  for  the  party  of  the  second  part  by 
Charles  P.  Irwin, 

Signed,  sealed  and  de_  :  Maxamilan  JJwickl 

livered  in  the  presence  of  ; 

Thomas  A.  Edison 

By  Chas.  p,  Irwin 

A.  M.  Kennedy,  Esq..  , 

Greenport,  N.Y. 

Dear  Sir: 

This  is  an  exact  copy  of  the  agreement  between  Thomas  A. 
Edison  and  Maxamilan  Zwickl.  I  have  sent  the  original  to  the 
labatory.  You  can  keep  this  one.  I  also  have  one.  I  will  try  ana 
run  down  and  see  you  some  of  these  days.  Hoping  you  are  having 
a  good  time  and  well. 

Yours  truly 

2773  ICtCjU,  0*^£- O  \^-'-^5-'CL»_Yk 

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OraNGE.N.J.  October  31st,  1917 

Mr.  Thomas  A.  Edison, 

General  Board  Boom, 

Navy  Annex, 

Washington,  B.  0. 

Bear  Mr.  Edisoni 

My  Kennedy  and  myself  have  gone  into  the  subject  of  dis¬ 
posing  of  the  Bampant  on  the  first  of  November,  and  find  that  we  are  up 
against  the  proposition  which  will  cost  us  quite  a  lot  more  and  delay  the 
work  about  one  week. 

In  the  first  place  there  is  a  mistake  in  the  copy  of 
letter  to  Mr.  Serrell  concerning  the  cost  of  the  boat.  Mr.  Kennedy  is 
sure  that  the  boat  will  only  cost  us  as  rental  $100.  for  the  coming  month. 

This  boat  now  provides  living  quarters  for  six  men  and 
has  all  kitchen  equipment  as  well  as  bunks  and  bedding,  all  at  a  cost  of 
$100.  pet  month. 

If  we  returned  the  boat  at  onoe  we  would,  of  course, 
have  to  purchase  or  rent  stove,  kitchen  utensils,  dishes,  spoons, 
knives,  etc.,  rent  a  room  and  use  the  oaptain  who  now  manages  the 
Hydraulic  and  a  sailor,  and  one  other  man  to  take  the  Bampant  back  to 
Bed  Bank,  where  it  is  to  be  delivered(as  owner  is  unwilling  to  lay  up 
at  Greenport. 

Sinoe  there  is  only  one  orew  for  two  boats,  the  return¬ 
ing  of  the  Bampant  will  take  our  only  orew  and  thereby  delay  work  for  from 

Mr.  Thomas  A.  Edison,  -2-  10/31/17 

five  days  to  a  week,  since  it  will  he  impossible  to  operate  the  Hydraulic 
during  their  absenoe. 

The  relative  expense  of  making  this  ohange  will  be 
approximately  as  follows: 

To  rent  of  Rampant  -  1  month  100.00 

By  rent  of  rooms  25.00 

Bedding,  dishes,  stove, 
kitchen  utensils  and 
necessary  furnishings 
for  30  days  100.00 

Estimated  expense  crew  to 

Red  Bank  and  return  100.00  _ 

$225.00  $100.00 

It  will  oost  $125.  more  to  send  the  Rampant  to  Red 
Bank  than  to  keep  it,  to  say  nothing  of  the  loss  of  valuable  time  in 
carrying  on  experiment,  and  our  inability  to  deliver  the  boat  at 
Red  Bank  by  Ootober  31st. 

I  am  enclosing  sketches  with  explanation  showing  test 
made  last  Monday.  I  am  at  the  laboratory  today  getting  supplies  and 
am  going  to  Hew  York  this  afternoon  and  take  up  with  the  Cable  people 
the  question  of  building  a  cable  whloh  will  carry  six  hundred  pounds 
and  to  weigh  about  the  same  as  sea  water,  at  the  same  time  hold  the 
diameter  as  small  as  possible,  not  to  exoeed  five-eighths  of  an  inoh. 

I  expeot  to  be  at  the  laboratory  in  the  morning  and  return  to  Greenport 

Ur.  Thomas  A.  Edison 


tomorrow  afternoon  at  4:00  o'clock  with  material  and  supplies. 

1  am  convinced  that  as  soon  as  they  can  get  the  rough 
edges  off  of  the  equipment  we  will  meet  your  expectations. 

fours  very  truly. 




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'Wv ru«i  '&<x-L^q. 

Orange, N.J.  November  5,  1917 



Bear  Mr.  Edison: 

Your  memo,  of  the  2nd  inst.  received  and  will  work  to  the 
ends  outlines  therein.  I  have  had  the  greatest  cooperation  hy  every  one 
we  would  go  to  for  material |  She  Western  Electric  and  Habashaw 
Eleotrlc  Cable  Company.  Both  of  the  companies  gave  us  their  assurance 
that  they  would  do  all  they  oould  to  assist.  •  All  of  your  men  at  the 
laboratory  are  doing  all  possible,  in  fact  I  have  had  no  trouble  to 
get  all  we  need. 

The  Habashaw  Co.  started  to  work  on  making  the  two  pieces 
of  cable  and  said  we  would  have  it  in  a  few  days  if  they  could  get  the 
Kopak  for  filler  to  make  the  cable  light*  This  material  you  mentioned 
to  me  while  I  was  there  with  you  and  X  looked  up  the  samples  in  your 
laboratory,  got  the  address  of  the  manufacturer  and  went  to  the  Habashaw 
works,  and  the  engineers  said  that  if  they  could  get  this  material  they 
would  make  up  the  two  pieces  2500  feet  long  in  a  week.  Shis  cable  is 
to  stand  a  strain  of  600  lbs.  and  to  have  an  outside  diameter  not  to 
exceed  one-half  inch.  Its  total  weight  to  be  the  same  as  sea  water, 
i.  e.,  about  1.03.  Shey  also  said  this  would  make  a  very  oheap  cable. 

X  expect  to  get  it  by  next  Eriday. 

She  reports  Mr.  Kennedy  sends  you  eaoh  day  I  concur  in  and 
'trust  they  keep  you  posted  as  to  my  movements.  Everything  is  working  very 
smoothly  and  we  expect  to  be  able  to  determine  something  very  soon. 

I  will  only  run  down  to  Hew  York  and  Orange  for  supplies  during  the 
day  and  hack  to  Greenport  at  night,  eo  we  oan  alwayB  he  reached  hy 
calling  the  Greenport  House,  the  proprietor  of  which  has  agreed  to 
send  out  for  us  any  time  we  are  wanted. 

Very  respectfully, 

Ur.  Thomas  A.  Edison, 

Washington,  D.  C. 

p.  S.  I  have  just  seen  the  Habashaw  people  and  they  say  they  will 
make  up  the  cable,  first  filling  it  with  ground  cork,  with  rubber  as 
a  binder.  This  will  give  the  proper  weight,  strength,  insulation 
and  conductivity*  and  not  to  exceed  one-half  inch.  The  Kopak  they 
say  they  are  sure  they  oan  uae  but  will  have  to  have  some  way  of  getting 
it  in  shape  so  that  they,  oan  lay  in  under  the  braid. 

The  first  cork  filled  cable  they  say  they  will  Bend  to 

us  next  Friday. 

s.  c.  s. 


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Rutgers,  The  State  University  of  New  Jersey 
Richard  L.  McCormick 
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Ann  Fabian 
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National  Park  Service 

Maryannc  Gerbauckas 
Michelle  Ortwcin 

Smithsonian  Institution 
Harold  Wallace 


Robert  Friedel,  University  of  Maryland 
Louis  Gaiambos,  Johns  Hopkins  University 
Susan  Hockey,  Oxford  University 
Thomas  P.  Hughes,  University  of  Pennsylvania 
Ronald  Kline,  Cornell  University 
Robert  Rosenberg,  John  Wiley  &  Sons 
Marc  Rothenberg,  Joseph  Henry  Papers,  Smithsonian  Institution 
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Senior  Editor 
Thomas  Jeffrey 

Associate  Editors 
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Theresa  Collins 

Assistant  Editor 
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Indexing  Editor 
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Consulting  Editor 
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Visiting  Editor 
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endorsed  by 

National  Historical  Publications  and  Records  Commission 
18  June  1981 

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The  original  documents  in  this  edition  are  from  the  archives  at  the  Edison  National 
Historic  Site  at  West  Orange,  New  Jersey. 

ISBN  978-0-88692-887-2 

a  Sd  U>aru^  ‘xhp 


Thomas  E.  Jeffrey 
Senior  Editor 

Brian  C.  Shipley 
Theresa  M.  Collins 
Linda  E.  Endersby 

David  A.  Ranzan 
Indexing  Editor 

Janette  Pardo 
Richard  Mizellc 
Peter  Mikulas 

Paul  B.  Israel 
Director  and  General  Editor 


Rutgers,  The  State  University  of  New  Jersey 
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